diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 2cb94c9c90..57e86ad8f6 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -42,7 +42,7 @@ jobs:
     needs: setup
     strategy:
       matrix:
-        runner: [windows-large, macos-12-xl]
+        runner: [windows-large, macos-13-xlarge]
         configuration: ${{ fromJSON(needs.setup.outputs.configurations) }}
     runs-on: ${{ matrix.runner }}
     outputs:
@@ -64,7 +64,7 @@ jobs:
       # autobuild-package.xml.
       AUTOBUILD_VCS_INFO: "true"
       AUTOBUILD_VSVER: "170"
-      DEVELOPER_DIR: "/Applications/Xcode_14.0.1.app/Contents/Developer"
+      DEVELOPER_DIR: "/Applications/Xcode_14.1.app/Contents/Developer"
       # Ensure that Linden viewer builds engage Bugsplat.
       BUGSPLAT_DB: ${{ needs.setup.outputs.bugsplat_db }}
       build_coverity: false
diff --git a/indra/llinventory/llsettingssky.cpp b/indra/llinventory/llsettingssky.cpp
index 6d1bfd3a1e..f30c8c3068 100644
--- a/indra/llinventory/llsettingssky.cpp
+++ b/indra/llinventory/llsettingssky.cpp
@@ -2068,6 +2068,14 @@ F32 LLSettingsSky::getTonemapMix() const
     return mTonemapMix;
 }
 
+void LLSettingsSky::setTonemapMix(F32 mix)
+{
+    if (mCanAutoAdjust)
+        return;
+
+    mTonemapMix = mix;
+}
+
 void LLSettingsSky::setGamma(F32 val)
 {
     mGamma = val;
diff --git a/indra/llinventory/llsettingssky.h b/indra/llinventory/llsettingssky.h
index 8d73c35ff3..4c635fd946 100644
--- a/indra/llinventory/llsettingssky.h
+++ b/indra/llinventory/llsettingssky.h
@@ -213,6 +213,7 @@ public:
     F32 getHDRMax() const;
     F32 getHDROffset() const;
     F32 getTonemapMix() const;
+    void setTonemapMix(F32 mix);
 
     void setGamma(F32 val);
 
diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index 6591dd03c2..a1faae0124 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -1324,6 +1324,7 @@ bool LLGLManager::initGL()
     glGetIntegerv(GL_MAX_INTEGER_SAMPLES, &mMaxIntegerSamples);
     glGetIntegerv(GL_MAX_SAMPLE_MASK_WORDS, &mMaxSampleMaskWords);
     glGetIntegerv(GL_MAX_SAMPLES, &mMaxSamples);
+    glGetIntegerv(GL_MAX_VARYING_VECTORS, &mMaxVaryingVectors);
     glGetIntegerv(GL_MAX_UNIFORM_BLOCK_SIZE, &mMaxUniformBlockSize);
 
     // sanity clamp max uniform block size to 64k just in case
diff --git a/indra/llrender/llgl.h b/indra/llrender/llgl.h
index c6e3b914ae..2ae39a2f23 100644
--- a/indra/llrender/llgl.h
+++ b/indra/llrender/llgl.h
@@ -90,6 +90,7 @@ public:
     S32 mGLMaxTextureSize;
     F32 mMaxAnisotropy = 0.f;
     S32 mMaxUniformBlockSize = 0;
+    S32 mMaxVaryingVectors = 0;
 
     // GL 4.x capabilities
     bool mHasCubeMapArray = false;
diff --git a/indra/newview/app_settings/graphic_preset_controls.xml b/indra/newview/app_settings/graphic_preset_controls.xml
index 280ce2066a..fe5775b67e 100644
--- a/indra/newview/app_settings/graphic_preset_controls.xml
+++ b/indra/newview/app_settings/graphic_preset_controls.xml
@@ -29,6 +29,7 @@
 		<string>RenderDesaturateIrradiance</string>
 		<string>RenderDiffuseLuminanceScale</string>
 		<string>RenderDisablePostProcessing</string>
+		<string>RenderDisableVintageMode</string>
 		<string>RenderDefaultProbeUpdatePeriod</string>
 		<string>RenderDynamicExposureCoefficient</string>
 		<string>RenderExposure</string>
@@ -99,7 +100,6 @@
 		<string>RenderUnloadedAvatar</string>
 		<string>RenderUseStreamVBO</string>
 		<string>RenderVBOEnable</string>
-		<string>RenderVintageMode</string>
 		<string>RenderVSyncEnable</string>
 		<string>RenderVolumeLODFactor</string>
 		<string>RenderWaterRefResolution</string>
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 52f702742e..929cfdb723 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -23219,16 +23219,16 @@ Change of this parameter will affect the layout of buttons in notification toast
     <key>Value</key>
     <integer>1</integer>
   </map>
-    <key>RenderVintageMode</key>
+    <key>RenderDisableVintageMode</key>
     <map>
         <key>Comment</key>
-        <string>Disable different rendering pipeline features to improve performance on older machines that makes the world look closer to how it used to prior to V7.</string>
+        <string>Enables additional rendering pipeline features on newer machines such as HDR and emissive textures on PBR content.</string>
         <key>Persist</key>
         <integer>1</integer>
         <key>Type</key>
         <string>Boolean</string>
         <key>Value</key>
-        <integer>0</integer>
+        <integer>1</integer>
     </map>
 
   <key>FSNetMapPhantomOpacity</key>
diff --git a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
index b47fae73af..94711be473 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
@@ -544,8 +544,10 @@ vec3 pbrCalcPointLightOrSpotLight(vec3 diffuseColor, vec3 specularColor,
         pbrPunctual(diffuseColor, specularColor, perceptualRoughness, metallic, n.xyz, v, lv, nl, diffPunc, specPunc);
         color = intensity * clamp(nl * (diffPunc + specPunc), vec3(0), vec3(10));
     }
-
-    return color;
+    float final_scale = 1.0;
+    if (classic_mode > 0)
+        final_scale = 0.9;
+    return color * final_scale;
 }
 
 void calcDiffuseSpecular(vec3 baseColor, float metallic, inout vec3 diffuseColor, inout vec3 specularColor)
@@ -576,22 +578,25 @@ vec3 pbrBaseLight(vec3 diffuseColor, vec3 specularColor, float metallic, vec3 v,
     // Depending on the sky, we combine these differently.
     if (classic_mode > 0)
     {
+        irradiance.rgb = srgb_to_linear(irradiance * 0.9); // BINGO
+
         // Reconstruct the diffuse lighting that we do for blinn-phong materials here.
         // A special note about why we do some really janky stuff for classic mode.
         // Since adding classic mode, we've moved the lambertian diffuse multiply out from pbrPunctual and instead handle it in the different light type calcs.
-        // For classic mode, this baiscally introduces a double multiplication that we need to somehow avoid
-        // Using one of the old mobile gamma correction tricks (val * val to "linearize", sqrt(val) to bring back into sRGB), we can _mostly_ avert this
         // This will never be 100% correct, but at the very least we can make it look mostly correct with legacy skies and classic mode.
 
-        float da = pow(sqrt(nl), 1.2);
+        float da = pow(nl, 1.2);
 
         vec3 sun_contrib = vec3(min(da, scol));
 
         // Multiply by PI to account for lambertian diffuse colors.  Otherwise things will be too dark when lit by the sun on legacy skies.
-        sun_contrib = srgb_to_linear(color.rgb * 0.9 + linear_to_srgb(sun_contrib) * sunlit * 0.7) * M_PI;
+        sun_contrib = srgb_to_linear(linear_to_srgb(sun_contrib) * sunlit * 0.7) * M_PI;
 
         // Manually recombine everything here.  We have to separate the shading to ensure that lighting is able to more closely match blinn-phong.
-        color.rgb = srgb_to_linear(iblDiff) + clamp(sun_contrib * (da * (diffPunc.rgb + specPunc.rgb) * scol), vec3(0), vec3(10));
+        vec3 finalAmbient = irradiance.rgb * diffuseColor.rgb; // BINGO
+        vec3 finalSun = clamp(sun_contrib * ((diffPunc.rgb + specPunc.rgb) * scol), vec3(0), vec3(10)); // QUESTIONABLE BINGO?
+        color.rgb = srgb_to_linear(linear_to_srgb(finalAmbient) + (linear_to_srgb(finalSun) * 1.1));
+        //color.rgb = sun_contrib * diffuseColor.rgb;
     }
     else
     {
diff --git a/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
index 89fe4b6007..02aaf24194 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
@@ -163,7 +163,10 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 diffuse, vec3 v, vec3 n, vec
 
         // no spec for alpha shader...
     }
-    col = max(col, vec3(0));
+    float final_scale = 1.0;
+    if (classic_mode > 0)
+        final_scale = 0.9;
+    col = max(col * final_scale, vec3(0));
     return col;
 }
 
@@ -241,7 +244,8 @@ void main()
     vec3 atten;
 
     calcAtmosphericVarsLinear(pos.xyz, norm, light_dir, sunlit, amblit, additive, atten);
-
+    if (classic_mode > 0)
+        sunlit *= 1.35;
     vec3 sunlit_linear = sunlit;
     vec3 amblit_linear = amblit;
 
@@ -296,11 +300,14 @@ void main()
     color.rgb = applySkyAndWaterFog(pos.xyz, additive, atten, color).rgb;
 
 #endif // #else // FOR_IMPOSTOR
-
+    float final_scale = 1;
+    if (classic_mode > 0)
+        final_scale = 1.1;
 #ifdef IS_HUD
     color.rgb = linear_to_srgb(color.rgb);
+    final_scale = 1;
 #endif
 
-    frag_color = max(color, vec4(0));
+    frag_color = max(color * final_scale, vec4(0));
 }
 
diff --git a/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl b/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl
index cec844559f..0418f99459 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl
@@ -43,6 +43,7 @@ uniform sampler2D lightMap;
 uniform int sun_up_factor;
 uniform vec3 sun_dir;
 uniform vec3 moon_dir;
+uniform int classic_mode;
 
 out vec4 frag_color;
 
@@ -160,7 +161,8 @@ void main()
     vec3 additive;
     vec3 atten;
     calcAtmosphericVarsLinear(pos.xyz, norm, light_dir, sunlit, amblit, additive, atten);
-
+    if (classic_mode > 0)
+        sunlit *= 1.35;
     vec3 sunlit_linear = sunlit;
 
     vec2 frag = vary_fragcoord.xy/vary_fragcoord.z*0.5+0.5;
@@ -212,8 +214,10 @@ void main()
     color.rgb = applySkyAndWaterFog(pos.xyz, additive, atten, vec4(color, 1.0)).rgb;
 
     float a = basecolor.a*vertex_color.a;
-
-    frag_color = max(vec4(color.rgb,a), vec4(0));
+    float final_scale = 1;
+    if (classic_mode > 0)
+        final_scale = 1.1;
+    frag_color = max(vec4(color.rgb * final_scale,a), vec4(0));
 }
 
 #else
diff --git a/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
index e15317f5b5..7f871c0d5e 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
@@ -178,8 +178,10 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spe
             }
         }
     }
-
-    return max(col, vec3(0.0, 0.0, 0.0));
+    float final_scale = 1.0;
+    if (classic_mode > 0)
+        final_scale = 0.9;
+    return max(col * final_scale, vec3(0.0, 0.0, 0.0));
 }
 
 #else
@@ -329,7 +331,8 @@ void main()
     vec3 additive;
     vec3 atten;
     calcAtmosphericVarsLinear(pos.xyz, norm.xyz, light_dir, sunlit, amblit, additive, atten);
-
+    if (classic_mode > 0)
+        sunlit *= 1.35;
     vec3 sunlit_linear = sunlit;
     vec3 amblit_linear = amblit;
 
@@ -418,8 +421,10 @@ void main()
     glare *= 1.0-emissive;
     glare = min(glare, 1.0);
     float al = max(diffcol.a, glare) * vertex_color.a;
-
-    frag_color = max(vec4(color, al), vec4(0));
+    float final_scale = 1;
+    if (classic_mode > 0)
+        final_scale = 1.1;
+    frag_color = max(vec4(color * final_scale, al), vec4(0));
 
 #else // mode is not DIFFUSE_ALPHA_MODE_BLEND, encode to gbuffer
     // deferred path               // See: C++: addDeferredAttachment(), shader: softenLightF.glsl
diff --git a/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl
index 8db3bcd363..96cda1ef49 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl
@@ -38,6 +38,7 @@ uniform vec4  light_col[LIGHT_COUNT]; // .a = falloff
 uniform vec2  screen_res;
 uniform float far_z;
 uniform mat4  inv_proj;
+uniform int classic_mode;
 
 in vec4 vary_fragcoord;
 
@@ -169,8 +170,10 @@ void main()
             }
         }
     }
-
-    frag_color.rgb = max(final_color, vec3(0));
+    float final_scale = 1.0;
+    if (classic_mode > 0)
+        final_scale = 0.9;
+    frag_color.rgb = max(final_color * final_scale, vec3(0));
     frag_color.a   = 0.0;
 
 #ifdef IS_AMD_CARD
diff --git a/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl
index 987089fcc9..ceb37f36a5 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl
@@ -44,6 +44,7 @@ uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 uniform vec4 viewport;
+uniform int classic_mode;
 
 void calcHalfVectors(vec3 lv, vec3 n, vec3 v, out vec3 h, out vec3 l, out float nh, out float nl, out float nv, out float vh, out float lightDist);
 float calcLegacyDistanceAttenuation(float distance, float falloff);
@@ -149,7 +150,9 @@ void main()
             discard;
         }
     }
-
-    frag_color.rgb = max(final_color, vec3(0));
+    float final_scale = 1.0;
+    if (classic_mode > 0)
+        final_scale = 0.9;
+    frag_color.rgb = max(final_color * final_scale, vec3(0));
     frag_color.a = 0.0;
 }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
index 52799dbba1..aac75a0739 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -155,6 +155,9 @@ void main()
 
     calcAtmosphericVarsLinear(pos.xyz, gb.normal, light_dir, sunlit, amblit, additive, atten);
 
+    if (classic_mode > 0)
+        sunlit *= 1.35;
+
     vec3 sunlit_linear = sunlit;
     vec3 amblit_linear = amblit;
 
@@ -224,7 +227,7 @@ void main()
             da = pow(da,1.2);
             vec3 sun_contrib = vec3(min(da, scol));
 
-            color.rgb = srgb_to_linear(color.rgb * 0.9 + linear_to_srgb(sun_contrib) * sunlit_linear * 0.7);
+            color.rgb = srgb_to_linear(color.rgb * 0.9 + (linear_to_srgb(sun_contrib) * sunlit_linear * 0.7));
             sunlit_linear = srgb_to_linear(sunlit_linear);
         }
         else
@@ -272,6 +275,9 @@ void main()
    }
 
     //color.r = classic_mode > 0 ? 1.0 : 0.0;
-    frag_color.rgb = max(color.rgb, vec3(0)); //output linear since local lights will be added to this shader's results
+    float final_scale = 1;
+    if (classic_mode > 0)
+        final_scale = 1.1;
+    frag_color.rgb = max(color.rgb * final_scale, vec3(0)); //output linear since local lights will be added to this shader's results
     frag_color.a = 0.0;
 }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
index 78db8ccf5b..a46e3688dc 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
@@ -47,6 +47,7 @@ uniform vec3 proj_origin; //origin of projection to be used for angular attenuat
 uniform float sun_wash;
 uniform int proj_shadow_idx;
 uniform float shadow_fade;
+uniform int classic_mode;
 
 // Light params
 #if defined(MULTI_SPOTLIGHT)
@@ -267,8 +268,10 @@ void main()
 
     //not sure why, but this line prevents MATBUG-194
     final_color = max(final_color, vec3(0.0));
-
+    float final_scale = 1.0;
+    if (classic_mode > 0)
+        final_scale = 0.9;
     //output linear
-    frag_color.rgb = final_color;
+    frag_color.rgb = final_color * final_scale;
     frag_color.a = 0.0;
 }
diff --git a/indra/newview/featuretable.txt b/indra/newview/featuretable.txt
index 3fbff62d62..bb66695961 100644
--- a/indra/newview/featuretable.txt
+++ b/indra/newview/featuretable.txt
@@ -1,4 +1,4 @@
-version 72
+version 73
 // The version number above should be incremented IF AND ONLY IF some
 // change has been made that is sufficiently important to justify
 // resetting the graphics preferences of all users to the recommended
@@ -86,7 +86,7 @@ RenderTonemapType			1   1
 RenderTonemapMix			1   1
 RenderEnableEmissiveBuffer  1   1
 RenderHDREnabled            1   1
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   1
 
 //
 // Low Graphics Settings
@@ -127,7 +127,7 @@ RenderCASSharpness          1   0
 RenderExposure				1   1
 RenderTonemapType			1   1
 RenderTonemapMix			1   0.7
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // Medium Low Graphics Settings
@@ -168,7 +168,7 @@ RenderCASSharpness          1   0
 RenderExposure				1   1
 RenderTonemapType			1   1
 RenderTonemapMix			1   0.7
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // Medium Graphics Settings (standard)
@@ -378,7 +378,7 @@ RenderShadowDetail			1	0
 RenderDeferredSSAO			1	0
 RenderMirrors				1	0
 RenderEnableEmissiveBuffer  1   0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // VRAM > 512MB
@@ -401,7 +401,7 @@ RenderDeferredSSAO			0	0
 RenderShadowDetail			0	0
 RenderReflectionProbeDetail	0	-1
 RenderMirrors				0	0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 list Intel
 RenderAnisotropic			1	0
@@ -424,7 +424,11 @@ RenderEnableEmissiveBuffer  1   0
 RenderGLMultiThreadedTextures 0 0
 RenderGLMultiThreadedMedia 0 0
 RenderHDREnabled            1   0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 list TexUnit16orLess
 RenderTerrainPBRDetail      1   -1
+
+list VaryingVectors16orLess
+RenderTerrainPBRPlanarSampleCount 1   1
+
diff --git a/indra/newview/featuretable_linux.txt b/indra/newview/featuretable_linux.txt
index e38ee2a50e..fe29a9f43b 100644
--- a/indra/newview/featuretable_linux.txt
+++ b/indra/newview/featuretable_linux.txt
@@ -1,4 +1,4 @@
-version 52
+version 53
 // The version number above should be incremented IF AND ONLY IF some
 // change has been made that is sufficiently important to justify
 // resetting the graphics preferences of all users to the recommended
@@ -86,7 +86,7 @@ RenderTonemapType			1   1
 RenderTonemapMix			1   1
 RenderEnableEmissiveBuffer  1   1
 RenderHDREnabled            1   1
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   1
 
 //
 // Low Graphics Settings
@@ -127,7 +127,7 @@ RenderCASSharpness          1   0
 RenderExposure				1   1
 RenderTonemapType			1   1
 RenderTonemapMix			1   0.7
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // Medium Low Graphics Settings
@@ -168,7 +168,7 @@ RenderCASSharpness          1   0
 RenderExposure				1   1
 RenderTonemapType			1   1
 RenderTonemapMix			1   0.7
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // Medium Graphics Settings (standard)
@@ -378,7 +378,7 @@ RenderShadowDetail			1	0
 RenderDeferredSSAO			1	0
 RenderMirrors				1	0
 RenderEnableEmissiveBuffer  1   0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // VRAM > 512MB
@@ -401,7 +401,7 @@ RenderDeferredSSAO			0	0
 RenderShadowDetail			0	0
 RenderReflectionProbeDetail	0	-1
 RenderMirrors				0	0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 list Intel
 RenderAnisotropic			1	0
@@ -428,7 +428,11 @@ RenderEnableEmissiveBuffer  1   0
 RenderGLMultiThreadedTextures 0 0
 RenderGLMultiThreadedMedia 0 0
 RenderHDREnabled            1   0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 list TexUnit16orLess
 RenderTerrainPBRDetail      1   -1
+
+list VaryingVectors16orLess
+RenderTerrainPBRPlanarSampleCount 1   1
+
diff --git a/indra/newview/featuretable_mac.txt b/indra/newview/featuretable_mac.txt
index ecf423cf80..da4e7bc432 100644
--- a/indra/newview/featuretable_mac.txt
+++ b/indra/newview/featuretable_mac.txt
@@ -1,4 +1,4 @@
-version 66
+version 68
 // The version number above should be incremented IF AND ONLY IF some
 // change has been made that is sufficiently important to justify
 // resetting the graphics preferences of all users to the recommended
@@ -83,7 +83,7 @@ RenderCASSharpness          1   1
 RenderExposure				1   1
 RenderTonemapType			1   1
 RenderTonemapMix			1   1
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   1
 
 //
 // Low Graphics Settings
@@ -124,7 +124,7 @@ RenderCASSharpness          1   0
 RenderExposure				1   1
 RenderTonemapType			1   1
 RenderTonemapMix			1   0.7
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // Medium Low Graphics Settings
@@ -165,7 +165,7 @@ RenderCASSharpness          1   0
 RenderExposure				1   1
 RenderTonemapType			1   1
 RenderTonemapMix			1   0.7
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 //
 // Medium Graphics Settings (standard)
@@ -374,7 +374,7 @@ list Unknown
 RenderShadowDetail			1	0
 RenderDeferredSSAO			1	0
 RenderMirrors				1	0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 
 //
@@ -396,7 +396,7 @@ RenderTerrainDetail 		1	0
 RenderDeferredSSAO			0	0
 RenderShadowDetail			0	0
 RenderMirrors				0	0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
 
 list TexUnit8orLess
 RenderDeferredSSAO			0	0
@@ -425,4 +425,7 @@ RenderFSAASamples           0   0
 RenderReflectionProbeDetail	0	0
 RenderReflectionsEnabled    0   0
 RenderMirrors				0	0
-RenderVintageMode           1   1
+RenderDisableVintageMode           1   0
+
+list VaryingVectors16orLess
+RenderTerrainPBRPlanarSampleCount 1   1
diff --git a/indra/newview/llfeaturemanager.cpp b/indra/newview/llfeaturemanager.cpp
index 939902b6b1..988f406a46 100644
--- a/indra/newview/llfeaturemanager.cpp
+++ b/indra/newview/llfeaturemanager.cpp
@@ -729,7 +729,11 @@ void LLFeatureManager::applyBaseMasks()
         LLImageGLThread::sEnabledTextures = false;
 
         // Make extra sure that vintage mode also gets enabled.
-        gSavedSettings.setBOOL("RenderVintageMode", true);
+        gSavedSettings.setBOOL("RenderDisableVintageMode", false);
+    }
+    if (gGLManager.mMaxVaryingVectors <= 16)
+    {
+        maskFeatures("VaryingVectors16orLess");
     }
 
     // now mask by gpu string
diff --git a/indra/newview/llfloaterpreference.cpp b/indra/newview/llfloaterpreference.cpp
index 381994845c..b6cfabe33d 100644
--- a/indra/newview/llfloaterpreference.cpp
+++ b/indra/newview/llfloaterpreference.cpp
@@ -2318,17 +2318,17 @@ void LLFloaterPreference::disableUnavailableSettings()
     }
 
     // Vintage mode
-    LLCachedControl<bool> is_vintage(gSavedSettings, "RenderVintageMode");
+    LLCachedControl<bool> is_not_vintage(gSavedSettings, "RenderDisableVintageMode");
     LLSliderCtrl* tonemapMix = getChild<LLSliderCtrl>("TonemapMix");
     LLComboBox* tonemapSelect = getChild<LLComboBox>("TonemapType");
     LLTextBox* tonemapLabel = getChild<LLTextBox>("TonemapTypeText");
     LLSliderCtrl* exposureSlider = getChild<LLSliderCtrl>("RenderExposure");
 
-    tonemapSelect->setEnabled(!is_vintage);
-    tonemapLabel->setEnabled(!is_vintage);
-    tonemapMix->setEnabled(!is_vintage);
-    exposureSlider->setEnabled(!is_vintage);
-    cas_slider->setEnabled(!is_vintage);
+    tonemapSelect->setEnabled(is_not_vintage);
+    tonemapLabel->setEnabled(is_not_vintage);
+    tonemapMix->setEnabled(is_not_vintage);
+    exposureSlider->setEnabled(is_not_vintage);
+    cas_slider->setEnabled(is_not_vintage);
 
 }
 
diff --git a/indra/newview/llfloaterpreferencesgraphicsadvanced.cpp b/indra/newview/llfloaterpreferencesgraphicsadvanced.cpp
index 640b90b1e0..76ee0046ad 100644
--- a/indra/newview/llfloaterpreferencesgraphicsadvanced.cpp
+++ b/indra/newview/llfloaterpreferencesgraphicsadvanced.cpp
@@ -322,17 +322,17 @@ void LLFloaterPreferenceGraphicsAdvanced::disableUnavailableSettings()
     }
 
     // Vintage mode
-    LLCachedControl<bool> is_vintage(gSavedSettings, "RenderVintageMode");
+    LLCachedControl<bool> is_not_vintage(gSavedSettings, "RenderDisableVintageMode");
     LLSliderCtrl*         tonemapMix    = getChild<LLSliderCtrl>("TonemapMix");
     LLComboBox*           tonemapSelect = getChild<LLComboBox>("TonemapType");
     LLTextBox*            tonemapLabel  = getChild<LLTextBox>("TonemapTypeText");
     LLSliderCtrl*         exposureSlider = getChild<LLSliderCtrl>("RenderExposure");
 
-    tonemapSelect->setEnabled(!is_vintage);
-    tonemapLabel->setEnabled(!is_vintage);
-    tonemapMix->setEnabled(!is_vintage);
-    exposureSlider->setEnabled(!is_vintage);
-    cas_slider->setEnabled(!is_vintage);
+    tonemapSelect->setEnabled(is_not_vintage);
+    tonemapLabel->setEnabled(is_not_vintage);
+    tonemapMix->setEnabled(is_not_vintage);
+    exposureSlider->setEnabled(is_not_vintage);
+    cas_slider->setEnabled(is_not_vintage);
 }
 
 void LLFloaterPreferenceGraphicsAdvanced::refreshEnabledState()
diff --git a/indra/newview/llmodelpreview.cpp b/indra/newview/llmodelpreview.cpp
index 1a195cadf9..5ea96030e3 100644
--- a/indra/newview/llmodelpreview.cpp
+++ b/indra/newview/llmodelpreview.cpp
@@ -776,7 +776,7 @@ void LLModelPreview::rebuildUploadData()
                         {
                             // in case user provided a missing file later
                             texture->setIsMissingAsset(false);
-                            texture->setLoadedCallback(LLModelPreview::textureLoadedCallback, 0, true, false, this, &mCallbackTextureList, false);
+                            texture->setLoadedCallback(LLModelPreview::textureLoadedCallback, 0, true, false, new LLHandle<LLModelPreview>(getHandle()), &mCallbackTextureList, false);
                             texture->forceToSaveRawImage(0, F32_MAX);
                             texture->updateFetch();
                             if (mModelLoader)
@@ -1023,6 +1023,10 @@ void LLModelPreview::loadModel(std::string filename, S32 lod, bool force_disable
     std::map<std::string, std::string> joint_alias_map;
     getJointAliases(joint_alias_map);
 
+    LLHandle<LLModelPreview> preview_handle = getHandle();
+    auto load_textures_cb =
+            [preview_handle](LLImportMaterial& material, void* opaque) { return LLModelPreview::loadTextures(material, preview_handle); };
+
     // three possible file extensions, .dae .gltf .glb
     // check for .dae and if not then assume one of the .gl??
     std::string filename_lc(filename);
@@ -1042,7 +1046,7 @@ void LLModelPreview::loadModel(std::string filename, S32 lod, bool force_disable
             lod,
             &LLModelPreview::loadedCallback,
             &LLModelPreview::lookupJointByName,
-            &LLModelPreview::loadTextures,
+            load_textures_cb,
             &LLModelPreview::stateChangedCallback,
             this,
             mJointTransformMap,
@@ -1062,7 +1066,7 @@ void LLModelPreview::loadModel(std::string filename, S32 lod, bool force_disable
             lod,
             &LLModelPreview::loadedCallback,
             &LLModelPreview::lookupJointByName,
-            &LLModelPreview::loadTextures,
+            load_textures_cb,
             &LLModelPreview::stateChangedCallback,
             this,
             mJointTransformMap,
@@ -4189,9 +4193,9 @@ LLJoint* LLModelPreview::lookupJointByName(const std::string& str, void* opaque)
     return NULL;
 }
 
-U32 LLModelPreview::loadTextures(LLImportMaterial& material, void* opaque)
+U32 LLModelPreview::loadTextures(LLImportMaterial& material, LLHandle<LLModelPreview> handle)
 {
-    if (material.mDiffuseMapFilename.size())
+    if (material.mDiffuseMapFilename.size() && !handle.isDead())
     {
         material.mOpaqueData = new LLPointer< LLViewerFetchedTexture >;
         LLPointer< LLViewerFetchedTexture >& tex = (*reinterpret_cast< LLPointer< LLViewerFetchedTexture > * >(material.mOpaqueData));
@@ -4202,10 +4206,8 @@ U32 LLModelPreview::loadTextures(LLImportMaterial& material, void* opaque)
             // file was loaded previosly, reload image to get potential changes
             tex->clearFetchedResults();
         }
-        // Todo: might cause a crash if preview gets closed before we get the callback.
-        // Use a callback list or guard callback in some way
-        LLModelPreview* preview = (LLModelPreview*)opaque;
-        tex->setLoadedCallback(LLModelPreview::textureLoadedCallback, 0, true, false, opaque, &preview->mCallbackTextureList, false);
+        LLModelPreview* preview = (LLModelPreview*)handle.get();
+        tex->setLoadedCallback(LLModelPreview::textureLoadedCallback, 0, true, false, new LLHandle<LLModelPreview>(handle), &preview->mCallbackTextureList, false);
         tex->forceToSaveRawImage(0, F32_MAX);
         material.setDiffuseMap(tex->getID()); // record tex ID
         return 1;
@@ -5151,16 +5153,29 @@ void LLModelPreview::textureLoadedCallback(
     bool final,
     void* userdata)
 {
-    LLModelPreview* preview = (LLModelPreview*)userdata;
-    preview->refresh();
+    if (!userdata)
+        return;
 
-    if (final && preview->mModelLoader)
+    LLHandle<LLModelPreview>* handle = (LLHandle<LLModelPreview>*)userdata;
+
+    if (!handle->isDead())
     {
-        if (preview->mModelLoader->mNumOfFetchingTextures > 0)
+        LLModelPreview* preview = static_cast<LLModelPreview*>(handle->get());
+        preview->refresh();
+
+        if (final && preview->mModelLoader)
         {
-            preview->mModelLoader->mNumOfFetchingTextures--;
+            if (preview->mModelLoader->mNumOfFetchingTextures > 0)
+            {
+                preview->mModelLoader->mNumOfFetchingTextures--;
+            }
         }
     }
+
+    if (final || !success)
+    {
+        delete handle;
+    }
 }
 
 // static
diff --git a/indra/newview/llmodelpreview.h b/indra/newview/llmodelpreview.h
index c2a93c077f..8c8a771440 100644
--- a/indra/newview/llmodelpreview.h
+++ b/indra/newview/llmodelpreview.h
@@ -111,7 +111,7 @@ static const std::string lod_label_name[NUM_LOD + 1] =
     "I went off the end of the lod_label_name array.  Me so smart."
 };
 
-class LLModelPreview : public LLViewerDynamicTexture, public LLMutex
+class LLModelPreview : public LLViewerDynamicTexture, public LLMutex, public LLHandleProvider<LLModelPreview>
 {
     LOG_CLASS(LLModelPreview);
 
@@ -217,7 +217,7 @@ protected:
     static void         stateChangedCallback(U32 state, void* opaque);
 
     static LLJoint* lookupJointByName(const std::string&, void* opaque);
-    static U32          loadTextures(LLImportMaterial& material, void* opaque);
+    static U32          loadTextures(LLImportMaterial& material, LLHandle<LLModelPreview> handle);
 
     void lookupLODModelFiles(S32 lod);
 
diff --git a/indra/newview/llsettingsvo.cpp b/indra/newview/llsettingsvo.cpp
index b1bef4c4d8..836b181623 100644
--- a/indra/newview/llsettingsvo.cpp
+++ b/indra/newview/llsettingsvo.cpp
@@ -804,10 +804,16 @@ void LLSettingsVOSky::applySpecial(void *ptarget, bool force)
     static LLCachedControl<F32> sunlight_scale(gSavedSettings, "RenderSkySunlightScale", 1.5f);
     static LLCachedControl<F32> sunlight_hdr_scale(gSavedSettings, "RenderHDRSkySunlightScale", 1.5f);
     static LLCachedControl<F32> ambient_scale(gSavedSettings, "RenderSkyAmbientScale", 1.5f);
+    static LLCachedControl<F32> tonemap_mix_setting(gSavedSettings, "RenderTonemapMix", 1.f);
 
     // sky is a "classic" sky following pre SL 7.0 shading
     bool classic_mode = psky->canAutoAdjust();
 
+    if (!classic_mode)
+    {
+        psky->setTonemapMix(tonemap_mix_setting);
+    }
+
     shader->uniform1f(LLShaderMgr::SKY_SUNLIGHT_SCALE, hdr ? sunlight_hdr_scale : sunlight_scale);
     shader->uniform1f(LLShaderMgr::SKY_AMBIENT_SCALE, ambient_scale);
     shader->uniform1i(LLShaderMgr::CLASSIC_MODE, classic_mode);
diff --git a/indra/newview/lltexturefetch.cpp b/indra/newview/lltexturefetch.cpp
index 919653f12f..f6291517ec 100644
--- a/indra/newview/lltexturefetch.cpp
+++ b/indra/newview/lltexturefetch.cpp
@@ -2752,7 +2752,7 @@ S32 LLTextureFetch::createRequest(FTType f_type, const std::string& url, const L
     LL_PROFILE_ZONE_SCOPED;
     if (mDebugPause)
     {
-        return -1;
+        return CREATE_REQUEST_ERROR_DEFAULT;
     }
 
     if (f_type == FTT_SERVER_BAKE)
@@ -2768,7 +2768,7 @@ S32 LLTextureFetch::createRequest(FTType f_type, const std::string& url, const L
                               << host << " != " << worker->mHost << LL_ENDL;
             removeRequest(worker, true);
             worker = NULL;
-            return -1;
+            return CREATE_REQUEST_ERROR_MHOSTS;
         }
     }
 
@@ -2821,13 +2821,13 @@ S32 LLTextureFetch::createRequest(FTType f_type, const std::string& url, const L
     {
         if (worker->wasAborted())
         {
-            return -1; // need to wait for previous aborted request to complete
+            return CREATE_REQUEST_ERROR_ABORTED; // need to wait for previous aborted request to complete
         }
         worker->lockWorkMutex();                                        // +Mw
         if (worker->mState == LLTextureFetchWorker::DONE && worker->mDesiredSize == llmax(desired_size, TEXTURE_CACHE_ENTRY_SIZE) && worker->mDesiredDiscard == desired_discard) {
             worker->unlockWorkMutex();                                  // -Mw
 
-            return -1; // similar request has failed or is in a transitional state
+            return CREATE_REQUEST_ERROR_TRANSITION; // similar request has finished, failed or is in a transitional state
         }
         worker->mActiveCount++;
         worker->mNeedsAux = needs_aux;
@@ -3852,6 +3852,43 @@ S32 LLTextureFetch::getFetchState(const LLUUID& id, F32& data_progress_p, F32& r
     return state;
 }
 
+// Threads:  T*
+S32 LLTextureFetch::getLastFetchState(const LLUUID& id, S32& requested_discard, S32& decoded_discard, bool& decoded)
+{
+    LL_PROFILE_ZONE_SCOPED;
+    S32 state = LLTextureFetchWorker::INVALID;
+
+    LLTextureFetchWorker* worker = getWorker(id);
+    if (worker) // Don't check haveWork, intent is to get whatever is in the worker
+    {
+        worker->lockWorkMutex();                                        // +Mw
+        state = worker->mState;
+        requested_discard = worker->mDesiredDiscard;
+        decoded_discard = worker->mDecodedDiscard;
+        decoded = worker->mDecoded;
+        worker->unlockWorkMutex();                                      // -Mw
+    }
+    return state;
+}
+
+// Threads:  T*
+S32 LLTextureFetch::getLastRawImage(const LLUUID& id,
+    LLPointer<LLImageRaw>& raw, LLPointer<LLImageRaw>& aux)
+{
+    LL_PROFILE_ZONE_SCOPED;
+    S32 decoded_discard = -1;
+    LLTextureFetchWorker* worker = getWorker(id);
+    if (worker && !worker->haveWork() && worker->mDecodedDiscard >= 0)
+    {
+            worker->lockWorkMutex();                                    // +Mw
+            raw = worker->mRawImage;
+            aux = worker->mAuxImage;
+            decoded_discard = worker->mDecodedDiscard;
+            worker->unlockWorkMutex();                                  // -Mw
+    }
+    return decoded_discard;
+}
+
 void LLTextureFetch::dump()
 {
     LL_INFOS(LOG_TXT) << "LLTextureFetch ACTIVE_HTTP:" << LL_ENDL;
diff --git a/indra/newview/lltexturefetch.h b/indra/newview/lltexturefetch.h
index eaf96793d2..b0fb7025ce 100644
--- a/indra/newview/lltexturefetch.h
+++ b/indra/newview/lltexturefetch.h
@@ -76,6 +76,14 @@ public:
     // Threads:  Tmain
     void shutDownImageDecodeThread();
 
+    enum e_crete_request_errors
+    {
+        CREATE_REQUEST_ERROR_DEFAULT = -1,
+        CREATE_REQUEST_ERROR_MHOSTS = -2,
+        CREATE_REQUEST_ERROR_ABORTED = -3,
+        CREATE_REQUEST_ERROR_TRANSITION = -4,
+    };
+
     // Threads:  T* (but Tmain mostly)
     S32 createRequest(FTType f_type, const std::string& url, const LLUUID& id, const LLHost& host, F32 priority,
                        S32 w, S32 h, S32 c, S32 discard, bool needs_aux, bool can_use_http);
@@ -122,12 +130,20 @@ public:
     // get the current fetch state, if any, from the given UUID
     S32 getFetchState(const LLUUID& id);
 
-    // @return  Fetch state of given image and associates statistics
+    // @return  Fetch state of an active given image and associates statistics
     //          See also getStateString
     // Threads:  T*
     S32 getFetchState(const LLUUID& id, F32& decode_progress_p, F32& requested_priority_p,
                       U32& fetch_priority_p, F32& fetch_dtime_p, F32& request_dtime_p, bool& can_use_http);
 
+    // @return  Fetch last state of given image
+    // Threads:  T*
+    S32 getLastFetchState(const LLUUID& id, S32& requested_discard, S32 &decoded_discard, bool &decoded);
+
+    // @return  Fetch last raw image
+    // Threads:  T*
+    S32 getLastRawImage(const LLUUID& id, LLPointer<LLImageRaw>& raw, LLPointer<LLImageRaw>& aux);
+
     // Debug utility - generally not safe
     void dump();
 
diff --git a/indra/newview/llviewercontrol.cpp b/indra/newview/llviewercontrol.cpp
index 5037eed688..4d880c9c3f 100644
--- a/indra/newview/llviewercontrol.cpp
+++ b/indra/newview/llviewercontrol.cpp
@@ -331,10 +331,10 @@ static bool handleEnableEmissiveChanged(const LLSD& newvalue)
     return handleReleaseGLBufferChanged(newvalue) && handleSetShaderChanged(newvalue);
 }
 
-static bool handleEnableClassicMode(const LLSD& newvalue)
+static bool handleDisableVintageMode(const LLSD& newvalue)
 {
-    gSavedSettings.setBOOL("RenderEnableEmissiveBuffer", !newvalue.asBoolean());
-    gSavedSettings.setBOOL("RenderHDREnabled", !newvalue.asBoolean());
+    gSavedSettings.setBOOL("RenderEnableEmissiveBuffer", newvalue.asBoolean());
+    gSavedSettings.setBOOL("RenderHDREnabled", newvalue.asBoolean());
     return true;
 }
 
@@ -1275,7 +1275,7 @@ void settings_setup_listeners()
     setting_setup_signal_listener(gSavedSettings, "RenderGlowResolutionPow", handleReleaseGLBufferChanged);
     setting_setup_signal_listener(gSavedSettings, "RenderGlowHDR", handleReleaseGLBufferChanged);
     setting_setup_signal_listener(gSavedSettings, "RenderEnableEmissiveBuffer", handleEnableEmissiveChanged);
-    setting_setup_signal_listener(gSavedSettings, "RenderVintageMode", handleEnableClassicMode);
+    setting_setup_signal_listener(gSavedSettings, "RenderDisableVintageMode", handleDisableVintageMode);
     setting_setup_signal_listener(gSavedSettings, "RenderHDREnabled", handleEnableHDR);
     setting_setup_signal_listener(gSavedSettings, "RenderGlowNoise", handleSetShaderChanged);
     setting_setup_signal_listener(gSavedSettings, "RenderGammaFull", handleSetShaderChanged);
diff --git a/indra/newview/llviewertexture.cpp b/indra/newview/llviewertexture.cpp
index 1ffd04920b..b16e27a66a 100644
--- a/indra/newview/llviewertexture.cpp
+++ b/indra/newview/llviewertexture.cpp
@@ -1881,6 +1881,141 @@ void LLViewerFetchedTexture::setBoostLevel(S32 level)
     }
 }
 
+bool LLViewerFetchedTexture::processFetchResults(S32& desired_discard, S32 current_discard, S32 fetch_discard, F32 decode_priority)
+{
+    // We may have data ready regardless of whether or not we are finished (e.g. waiting on write)
+    if (mRawImage.notNull())
+    {
+        LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - has raw image");
+        LLTexturePipelineTester* tester = (LLTexturePipelineTester*)LLMetricPerformanceTesterBasic::getTester(sTesterName);
+        if (tester)
+        {
+            mIsFetched = true;
+            tester->updateTextureLoadingStats(this, mRawImage, LLAppViewer::getTextureFetch()->isFromLocalCache(mID));
+        }
+        mRawDiscardLevel = fetch_discard;
+        if ((mRawImage->getDataSize() > 0 && mRawDiscardLevel >= 0) &&
+            (current_discard < 0 || mRawDiscardLevel < current_discard))
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - data good");
+
+            // This is going to conflict with Develop, just pick from develop
+            // where it uses setDimensions instead of setTexelsPerImage
+            mFullWidth = mRawImage->getWidth() << mRawDiscardLevel;
+            mFullHeight = mRawImage->getHeight() << mRawDiscardLevel;
+            setTexelsPerImage();
+
+            if (mFullWidth > MAX_IMAGE_SIZE || mFullHeight > MAX_IMAGE_SIZE)
+            {
+                //discard all oversized textures.
+                destroyRawImage();
+                LL_WARNS() << "oversize, setting as missing" << LL_ENDL;
+                setIsMissingAsset();
+                mRawDiscardLevel = INVALID_DISCARD_LEVEL;
+                mIsFetching = false;
+                mLastPacketTimer.reset();
+            }
+            else
+            {
+                mIsRawImageValid = true;
+                addToCreateTexture();
+            }
+
+            if (mBoostLevel == LLGLTexture::BOOST_ICON)
+            {
+                S32 expected_width = mKnownDrawWidth > 0 ? mKnownDrawWidth : DEFAULT_ICON_DIMENSIONS;
+                S32 expected_height = mKnownDrawHeight > 0 ? mKnownDrawHeight : DEFAULT_ICON_DIMENSIONS;
+                if (mRawImage && (mRawImage->getWidth() > expected_width || mRawImage->getHeight() > expected_height))
+                {
+                    // scale oversized icon, no need to give more work to gl
+                    // since we got mRawImage from thread worker and image may be in use (ex: writing cache), make a copy
+                    //
+                    // BOOST_ICON gets scaling because profile icons can have a bunch of different formats, not just j2c
+                    // Might need another pass to use discard for j2c and scaling for everything else.
+                    mRawImage = mRawImage->scaled(expected_width, expected_height);
+                }
+            }
+
+            if (mBoostLevel == LLGLTexture::BOOST_THUMBNAIL)
+            {
+                S32 expected_width = mKnownDrawWidth > 0 ? mKnownDrawWidth : DEFAULT_THUMBNAIL_DIMENSIONS;
+                S32 expected_height = mKnownDrawHeight > 0 ? mKnownDrawHeight : DEFAULT_THUMBNAIL_DIMENSIONS;
+                if (mRawImage && (mRawImage->getWidth() > expected_width || mRawImage->getHeight() > expected_height))
+                {
+                    // scale oversized icon, no need to give more work to gl
+                    // since we got mRawImage from thread worker and image may be in use (ex: writing cache), make a copy
+                    //
+                    // Todo: probably needs to be remade to use discard, all thumbnails are supposed to be j2c,
+                    // so no need to scale, should be posible to use discard to scale image down.
+                    mRawImage = mRawImage->scaled(expected_width, expected_height);
+                }
+            }
+
+            return true;
+        }
+        else
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - data not needed");
+            // Data is ready but we don't need it
+            // (received it already while fetcher was writing to disk)
+            destroyRawImage();
+            return false; // done
+        }
+    }
+
+    if (!mIsFetching)
+    {
+        if ((decode_priority > 0)
+            && (mRawDiscardLevel < 0 || mRawDiscardLevel == INVALID_DISCARD_LEVEL)
+            && mFetchState > 1) // 1 - initial, make sure fetcher did at least something
+        {
+            // We finished but received no data
+            if (getDiscardLevel() < 0)
+            {
+                if (getFTType() != FTT_MAP_TILE)
+                {
+                    LL_WARNS() << mID
+                        << " Fetch failure, setting as missing, decode_priority " << decode_priority
+                        << " mRawDiscardLevel " << mRawDiscardLevel
+                        << " current_discard " << current_discard
+                        << " stats " << mLastHttpGetStatus.toHex()
+                        << " worker state " << mFetchState
+                        << LL_ENDL;
+                }
+                setIsMissingAsset();
+                desired_discard = -1;
+            }
+            else
+            {
+                //LL_WARNS() << mID << ": Setting min discard to " << current_discard << LL_ENDL;
+                if (current_discard >= 0)
+                {
+                    mMinDiscardLevel = current_discard;
+                    //desired_discard = current_discard;
+                }
+                else
+                {
+                    S32 dis_level = getDiscardLevel();
+                    mMinDiscardLevel = dis_level;
+                    //desired_discard = dis_level;
+                }
+            }
+            destroyRawImage();
+        }
+        else if (mRawImage.notNull())
+        {
+            // We have data, but our fetch failed to return raw data
+            // *TODO: FIgure out why this is happening and fix it
+            // Potentially can happen when TEX_LIST_SCALE and TEX_LIST_STANDARD
+            // get requested for the same texture id at the same time
+            // (two textures, one fetcher)
+            destroyRawImage();
+        }
+    }
+
+    return true;
+}
+
 bool LLViewerFetchedTexture::updateFetch()
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE;
@@ -1965,130 +2100,12 @@ bool LLViewerFetchedTexture::updateFetch()
                                                                         mFetchPriority, mFetchDeltaTime, mRequestDeltaTime, mCanUseHTTP);
         }
 
-        // We may have data ready regardless of whether or not we are finished (e.g. waiting on write)
-        if (mRawImage.notNull())
+        if (!processFetchResults(desired_discard, current_discard, fetch_discard, decode_priority))
         {
-            LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - has raw image");
-            LLTexturePipelineTester* tester = (LLTexturePipelineTester*)LLMetricPerformanceTesterBasic::getTester(sTesterName);
-            if (tester)
-            {
-                mIsFetched = true;
-                tester->updateTextureLoadingStats(this, mRawImage, LLAppViewer::getTextureFetch()->isFromLocalCache(mID));
-            }
-            mRawDiscardLevel = fetch_discard;
-            if ((mRawImage->getDataSize() > 0 && mRawDiscardLevel >= 0) &&
-                (current_discard < 0 || mRawDiscardLevel < current_discard))
-            {
-                LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - data good");
-                mFullWidth = mRawImage->getWidth() << mRawDiscardLevel;
-                mFullHeight = mRawImage->getHeight() << mRawDiscardLevel;
-                setTexelsPerImage();
-
-                if(mFullWidth > MAX_IMAGE_SIZE || mFullHeight > MAX_IMAGE_SIZE)
-                {
-                    //discard all oversized textures.
-                    LL_INFOS() << "Discarding oversized texture, width= "
-                        << mFullWidth << ", height= "
-                        << mFullHeight << LL_ENDL;
-                    destroyRawImage();
-                    LL_WARNS() << "oversize, setting as missing" << LL_ENDL;
-                    setIsMissingAsset();
-                    mRawDiscardLevel = INVALID_DISCARD_LEVEL;
-                    mIsFetching = false;
-                    mLastPacketTimer.reset();
-                }
-                else
-                {
-                    mIsRawImageValid = true;
-                    addToCreateTexture();
-                }
-
-                if (mBoostLevel == LLGLTexture::BOOST_ICON)
-                {
-                    S32 expected_width = mKnownDrawWidth > 0 ? mKnownDrawWidth : DEFAULT_ICON_DIMENSIONS;
-                    S32 expected_height = mKnownDrawHeight > 0 ? mKnownDrawHeight : DEFAULT_ICON_DIMENSIONS;
-                    if (mRawImage && (mRawImage->getWidth() > expected_width || mRawImage->getHeight() > expected_height))
-                    {
-                        // scale oversized icon, no need to give more work to gl
-                        // since we got mRawImage from thread worker and image may be in use (ex: writing cache), make a copy
-                        mRawImage = mRawImage->scaled(expected_width, expected_height);
-                    }
-                }
-
-                if (mBoostLevel == LLGLTexture::BOOST_THUMBNAIL)
-                {
-                    S32 expected_width = mKnownDrawWidth > 0 ? mKnownDrawWidth : DEFAULT_THUMBNAIL_DIMENSIONS;
-                    S32 expected_height = mKnownDrawHeight > 0 ? mKnownDrawHeight : DEFAULT_THUMBNAIL_DIMENSIONS;
-                    if (mRawImage && (mRawImage->getWidth() > expected_width || mRawImage->getHeight() > expected_height))
-                    {
-                        // scale oversized icon, no need to give more work to gl
-                        // since we got mRawImage from thread worker and image may be in use (ex: writing cache), make a copy
-                        mRawImage = mRawImage->scaled(expected_width, expected_height);
-                    }
-                }
-
-                return true;
-            }
-            else
-            {
-                LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - data not needed");
-                // Data is ready but we don't need it
-                // (received it already while fetcher was writing to disk)
-                destroyRawImage();
-                return false; // done
-            }
+            return false;
         }
 
-        if (!mIsFetching)
-        {
-            if ((decode_priority > 0)
-                && (mRawDiscardLevel < 0 || mRawDiscardLevel == INVALID_DISCARD_LEVEL)
-                && mFetchState > 1) // 1 - initial, make sure fetcher did at least something
-            {
-                // We finished but received no data
-                if (getDiscardLevel() < 0)
-                {
-                    if (getFTType() != FTT_MAP_TILE)
-                    {
-                        LL_WARNS() << mID
-                                << " Fetch failure, setting as missing, decode_priority " << decode_priority
-                                << " mRawDiscardLevel " << mRawDiscardLevel
-                                << " current_discard " << current_discard
-                                << " stats " << mLastHttpGetStatus.toHex()
-                                << " worker state " << mFetchState
-                                << LL_ENDL;
-                    }
-                    setIsMissingAsset();
-                    desired_discard = -1;
-                }
-                else
-                {
-                    //LL_WARNS() << mID << ": Setting min discard to " << current_discard << LL_ENDL;
-                    if(current_discard >= 0)
-                    {
-                        mMinDiscardLevel = current_discard;
-                        //desired_discard = current_discard;
-                    }
-                    else
-                    {
-                        S32 dis_level = getDiscardLevel();
-                        mMinDiscardLevel = dis_level;
-                        //desired_discard = dis_level;
-                    }
-                }
-                destroyRawImage();
-            }
-            else if (mRawImage.notNull())
-            {
-                // We have data, but our fetch failed to return raw data
-                // *TODO: FIgure out why this is happening and fix it
-                // Potentially can happen when TEX_LIST_SCALE and TEX_LIST_STANDARD
-                // get requested for the same texture id at the same time
-                // (two textures, one fetcher)
-                destroyRawImage();
-            }
-        }
-        else
+        if (mIsFetching)
         {
             static const F32 MAX_HOLD_TIME = 5.0f; //seconds to wait before canceling fecthing if decode_priority is 0.f.
             if(decode_priority > 0.0f || mStopFetchingTimer.getElapsedTimeF32() > MAX_HOLD_TIME)
@@ -2167,21 +2184,49 @@ bool LLViewerFetchedTexture::updateFetch()
         }
 
         // bypass texturefetch directly by pulling from LLTextureCache
-        S32 fetch_request_discard = -1;
-        fetch_request_discard = LLAppViewer::getTextureFetch()->createRequest(mFTType, mUrl, getID(), getTargetHost(), decode_priority,
+        S32 fetch_request_response = -1;
+        S32 worker_discard = -1;
+        fetch_request_response = LLAppViewer::getTextureFetch()->createRequest(mFTType, mUrl, getID(), getTargetHost(), decode_priority,
                                                                               w, h, c, desired_discard, needsAux(), mCanUseHTTP);
 
-        if (fetch_request_discard >= 0)
+        if (fetch_request_response >= 0) // positive values and 0 are discard values
         {
             LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - request created");
             mHasFetcher = true;
             mIsFetching = true;
             // in some cases createRequest can modify discard, as an example
             // bake textures are always at discard 0
-            mRequestedDiscardLevel = llmin(desired_discard, fetch_request_discard);
+            mRequestedDiscardLevel = llmin(desired_discard, fetch_request_response);
             mFetchState = LLAppViewer::getTextureFetch()->getFetchState(mID, mDownloadProgress, mRequestedDownloadPriority,
                                                        mFetchPriority, mFetchDeltaTime, mRequestDeltaTime, mCanUseHTTP);
         }
+        else if (fetch_request_response == LLTextureFetch::CREATE_REQUEST_ERROR_TRANSITION)
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_TEXTURE("vftuf - processing transition error");
+            // Request wasn't created because similar one finished or is in a transitional state, check worker state
+            // As an example can happen if an image (like a server bake always fetches at dis 0), was scaled down to
+            // needed discard after fetching then sudenly needed higher dis and worker wasn't yet deleted. Worker
+            // discard will be identical to requested one and worker will have nothing new to do despite GL image
+            // not being up to data.
+            S32 desired_discard;
+            S32 decoded_discard;
+            bool decoded;
+            S32 fetch_state = LLAppViewer::getTextureFetch()->getLastFetchState(mID, desired_discard, decoded_discard, decoded);
+            if (fetch_state > 1 && decoded && decoded_discard >=0 && decoded_discard <= desired_discard)
+            {
+                // worker actually has the image
+                if (mRawImage.notNull()) sRawCount--;
+                if (mAuxRawImage.notNull()) sAuxCount--;
+                decoded_discard = LLAppViewer::getTextureFetch()->getLastRawImage(getID(), mRawImage, mAuxRawImage);
+                if (mRawImage.notNull()) sRawCount++;
+                if (mAuxRawImage.notNull())
+                {
+                    mHasAux = true;
+                    sAuxCount++;
+                }
+                processFetchResults(desired_discard, current_discard, decoded_discard, decode_priority);
+            }
+        }
 
         // If createRequest() failed, that means one of two things:
         // 1. We're finishing up a request for this UUID, so we
@@ -3006,7 +3051,7 @@ void LLViewerLODTexture::processTextureStats()
         mDesiredDiscardLevel = 0;
     }
     // Generate the request priority and render priority
-    else if (mDontDiscard || !mUseMipMaps || (getFTType() == FTT_MAP_TILE))
+    else if (mDontDiscard || !mUseMipMaps)
     {
         mDesiredDiscardLevel = 0;
         if (mFullWidth > MAX_IMAGE_SIZE_DEFAULT || mFullHeight > MAX_IMAGE_SIZE_DEFAULT)
diff --git a/indra/newview/llviewertexture.h b/indra/newview/llviewertexture.h
index 9a7868f2cd..bf890dbde7 100644
--- a/indra/newview/llviewertexture.h
+++ b/indra/newview/llviewertexture.h
@@ -457,6 +457,8 @@ private:
     void init(bool firstinit) ;
     void cleanup() ;
 
+    bool processFetchResults(S32& desired_discard, S32 current_discard, S32 fetch_discard, F32 decode_priority);
+
     void saveRawImage() ;
 
 private:
diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index da793b0e27..b7e38be687 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -919,8 +919,10 @@ void LLVOVolume::updateTextureVirtualSize(bool forced)
     for (S32 i = 0; i < num_faces; i++)
     {
         LLFace* face = mDrawable->getFace(i);
-        if (!face) continue;
+        if (!face || face->mExtents[0].equals3(face->mExtents[1])) continue;
         const LLTextureEntry *te = face->getTextureEntry();
+        if (!te) continue;
+
         LLViewerTexture *imagep = nullptr;
         U32 ch_min;
         U32 ch_max;
@@ -939,8 +941,7 @@ void LLVOVolume::updateTextureVirtualSize(bool forced)
             // Get _a_ non-null texture if possible (usually diffuse/basecolor, but could be something else)
             imagep = face->getTexture(ch);
         }
-        if (!imagep || !te ||
-            face->mExtents[0].equals3(face->mExtents[1]))
+        if (!imagep)
         {
             continue;
         }
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index a33e491f99..fb4c671c8e 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -7292,8 +7292,6 @@ void LLPipeline::tonemap(LLRenderTarget* src, LLRenderTarget* dst)
 
         static LLCachedControl<U32> tonemap_type_setting(gSavedSettings, "RenderTonemapType", 0U);
         shader.uniform1i(tonemap_type, tonemap_type_setting);
-
-        static LLCachedControl<F32> tonemap_mix_setting(gSavedSettings, "RenderTonemapMix", 1.f);
         shader.uniform1f(tonemap_mix, psky->getTonemapMix());
 
         mScreenTriangleVB->setBuffer();
@@ -8737,6 +8735,7 @@ void LLPipeline::renderDeferredLighting()
             std::list<LLVector4>        fullscreen_lights;
             LLDrawable::drawable_list_t spot_lights;
             LLDrawable::drawable_list_t fullscreen_spot_lights;
+            LLSettingsSky::ptr_t        psky        = LLEnvironment::instance().getCurrentSky();
 
             if (!gCubeSnapshot)
             {
@@ -8838,6 +8837,8 @@ void LLPipeline::renderDeferredLighting()
                         gDeferredLightProgram.uniform1f(LLShaderMgr::LIGHT_SIZE, s);
                         gDeferredLightProgram.uniform3fv(LLShaderMgr::DIFFUSE_COLOR, 1, col.mV);
                         gDeferredLightProgram.uniform1f(LLShaderMgr::LIGHT_FALLOFF, volume->getLightFalloff(DEFERRED_LIGHT_FALLOFF));
+                        gDeferredLightProgram.uniform1i(LLShaderMgr::CLASSIC_MODE, (psky->canAutoAdjust()) ? 1 : 0);
+
                         gGL.syncMatrices();
 
                         mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, get_box_fan_indices(camera, center));
@@ -8898,6 +8899,8 @@ void LLPipeline::renderDeferredLighting()
                     gDeferredSpotLightProgram.uniform1f(LLShaderMgr::LIGHT_SIZE, s);
                     gDeferredSpotLightProgram.uniform3fv(LLShaderMgr::DIFFUSE_COLOR, 1, col.mV);
                     gDeferredSpotLightProgram.uniform1f(LLShaderMgr::LIGHT_FALLOFF, volume->getLightFalloff(DEFERRED_LIGHT_FALLOFF));
+                    gDeferredSpotLightProgram.uniform1i(LLShaderMgr::CLASSIC_MODE, (psky->canAutoAdjust()) ? 1 : 0);
+
                     gGL.syncMatrices();
 
                     mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, get_box_fan_indices(camera, center));
@@ -8936,6 +8939,7 @@ void LLPipeline::renderDeferredLighting()
                         gDeferredMultiLightProgram[idx].uniform4fv(LLShaderMgr::MULTI_LIGHT, count, (GLfloat*)light);
                         gDeferredMultiLightProgram[idx].uniform4fv(LLShaderMgr::MULTI_LIGHT_COL, count, (GLfloat*)col);
                         gDeferredMultiLightProgram[idx].uniform1f(LLShaderMgr::MULTI_LIGHT_FAR_Z, far_z);
+                        gDeferredMultiLightProgram[idx].uniform1i(LLShaderMgr::CLASSIC_MODE, (psky->canAutoAdjust()) ? 1 : 0);
                         far_z = 0.f;
                         count = 0;
                         mScreenTriangleVB->setBuffer();
@@ -8973,6 +8977,8 @@ void LLPipeline::renderDeferredLighting()
                     gDeferredMultiSpotLightProgram.uniform1f(LLShaderMgr::LIGHT_SIZE, light_size_final);
                     gDeferredMultiSpotLightProgram.uniform3fv(LLShaderMgr::DIFFUSE_COLOR, 1, col.mV);
                     gDeferredMultiSpotLightProgram.uniform1f(LLShaderMgr::LIGHT_FALLOFF, light_falloff_final);
+                    gDeferredMultiSpotLightProgram.uniform1i(LLShaderMgr::CLASSIC_MODE, (psky->canAutoAdjust()) ? 1 : 0);
+
                     mScreenTriangleVB->drawArrays(LLRender::TRIANGLES, 0, 3);
                 }
 
diff --git a/indra/newview/skins/default/xui/de/panel_preferences_graphics1.xml b/indra/newview/skins/default/xui/de/panel_preferences_graphics1.xml
index c9c9dceb9c..ddc7478280 100644
--- a/indra/newview/skins/default/xui/de/panel_preferences_graphics1.xml
+++ b/indra/newview/skins/default/xui/de/panel_preferences_graphics1.xml
@@ -223,7 +223,7 @@
 		<text name="Miscellaneous Rendering">
 			Sonstige Darstellungsoptionen:
 		</text>
-		<check_box label="Vintage-Modus" tool_tip="Deaktiviert diverse Features der Rendering-Pipeline um die Leistung auf älteren Maschinen zu verbessern und nähert das Aussehen der Welt näher an das Aussehen vor Version 7 an." name="RenderVintageMode"/>
+		<check_box label="HDR und Emissive" tool_tip="Aktiviert zusätzliche Features der Rendering-Pipeline auf neueren Maschinen, wie HDR und Emissive-Texturen auf PBR-Materialien." name="VintageMode"/>
 		<check_box label="Alpha-Masken verwenden" tool_tip="Falls aktiviert werden Alpha-Masken korrekt dargestellt." name="RenderAutoMaskAlphaDeferred"/>
 		<check_box label="Leuchten anzeigen" tool_tip="Stellt Leuchteffekte dar. Stärke muss auf 0 gesetzt werden, um Leuchteffekte zu deaktiveren, falls Schatten aktiviert sind." name="RenderGlow"/>
 		<slider label="Stärke:" tool_tip="Leuchtstärke. Größer = Breitere und weichere Darstellung (Standardwert: 2)" name="glow_strength"/>
diff --git a/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml b/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml
index 16b06c14d6..6b61f34b23 100644
--- a/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml
+++ b/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml
@@ -685,10 +685,10 @@
   </check_box>
 
     <check_box
-      control_name="RenderVintageMode"
+      control_name="RenderDisableVintageMode"
       height="16"
       initial_value="false"
-      label="Vintage Mode"
+      label="HDR and Emissive"
       layout="topleft"
       left="420"
       name="VintageMode"
diff --git a/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml b/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml
index 5a20c4a0b1..2ea14aac30 100644
--- a/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml
+++ b/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml
@@ -754,7 +754,7 @@
 
         <slider
          control_name="RenderExposure"
-         disabled_control="RenderVintageMode"
+         disabled_control="RenderDisableVintageMode"
          decimal_digits="1"
          follows="left|top"
          height="15"
@@ -1421,14 +1421,14 @@ If you do not understand the distinction then leave this control alone."
             Miscellaneous Rendering:
         </text>
         <check_box
-         control_name="RenderVintageMode"
+         control_name="RenderDisableVintageMode"
          height="16"
          initial_value="false"
-         label="Vintage Mode"
-         tool_tip="Disable different rendering pipeline features to improve performance on older machines that makes the world look closer to how it used to prior to V7."
+         label="HDR and Emissive"
+         tool_tip="Enables additional rendering pipeline features on newer machines such as HDR and emissive textures on PBR content."
          layout="topleft"
          left_delta="10"
-         name="RenderVintageMode"
+         name="VintageMode"
          top_pad="6"
          width="256">
          <check_box.commit_callback