diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index a00aa86d78..e816eed3e0 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -14316,19 +14316,6 @@
       <key>Value</key>
       <integer>1</integer>
     </map>
-    <!-- SL-12594 removes fixed function rendering
-    <key>VertexShaderEnable</key>
-    <map>
-      <key>Comment</key>
-      <string>Enable/disable all GLSL shaders (debug)</string>
-      <key>Persist</key>
-      <integer>1</integer>
-      <key>Type</key>
-      <string>Boolean</string>
-      <key>Value</key>
-      <integer>0</integer>
-    </map>
-    <-->
     <key>VivoxAutoPostCrashDumps</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/featuretable.txt b/indra/newview/featuretable.txt
index e6ee458719..f1bf8d76c2 100644
--- a/indra/newview/featuretable.txt
+++ b/indra/newview/featuretable.txt
@@ -56,7 +56,6 @@ RenderVBOMappingDisable		1	1
 RenderVolumeLODFactor		1	2.0
 UseStartScreen				1	1
 UseOcclusion				1	1
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 WLSkyDetail					1	128
 Disregard128DefaultDrawDistance	1	1
@@ -95,7 +94,6 @@ RenderTerrainLODFactor		1	1
 RenderTransparentWater		1	0
 RenderTreeLODFactor			1	0
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	0
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -127,7 +125,6 @@ RenderTerrainLODFactor		1	1
 RenderTransparentWater		1	0
 RenderTreeLODFactor			1	0
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -158,7 +155,6 @@ RenderTerrainLODFactor		1	1.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -189,7 +185,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -220,7 +215,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	0
@@ -251,7 +245,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	1
@@ -282,7 +275,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	1
@@ -312,7 +304,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	1.0
 RenderVolumeLODFactor		1	2.0
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 WLSkyDetail					1	128
 RenderDeferred				1	1
@@ -380,7 +371,6 @@ list NoPixelShaders
 RenderAvatarVP				0	0
 RenderAvatarCloth			0	0
 RenderReflectionDetail		0	0
-VertexShaderEnable			0	0
 WindLightUseAtmosShaders	0	0
 RenderDeferred				0	0
 RenderDeferredSSAO			0	0
@@ -394,7 +384,6 @@ list NoVertexShaders
 RenderAvatarVP				0	0
 RenderAvatarCloth			0	0
 RenderReflectionDetail		0	0
-VertexShaderEnable			0	0
 WindLightUseAtmosShaders	0	0
 RenderDeferred				0	0
 RenderDeferredSSAO			0	0
diff --git a/indra/newview/featuretable_linux.txt b/indra/newview/featuretable_linux.txt
index bc836a99ca..5542eee6ca 100644
--- a/indra/newview/featuretable_linux.txt
+++ b/indra/newview/featuretable_linux.txt
@@ -56,7 +56,6 @@ RenderVBOMappingDisable		1	1
 RenderVolumeLODFactor		1	2.0
 UseStartScreen				1	1
 UseOcclusion				1	1
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 WLSkyDetail					1	128
 Disregard128DefaultDrawDistance	1	1
@@ -94,7 +93,6 @@ RenderTerrainLODFactor		1	1
 RenderTransparentWater		1	0
 RenderTreeLODFactor			1	0
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -126,7 +124,6 @@ RenderTerrainLODFactor		1	1
 RenderTransparentWater		1	0
 RenderTreeLODFactor			1	0
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	0
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -157,7 +154,6 @@ RenderTerrainLODFactor		1	1.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -188,7 +184,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -219,7 +214,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderUseAdvancedAtmospherics 1 0
@@ -250,7 +244,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	1
@@ -281,7 +274,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	1
@@ -311,7 +303,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	1.0
 RenderVolumeLODFactor		1	2.0
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 WLSkyDetail					1	128
 RenderDeferred				1	1
@@ -379,7 +370,6 @@ list NoPixelShaders
 RenderAvatarVP				0	0
 RenderAvatarCloth			0	0
 RenderReflectionDetail		0	0
-VertexShaderEnable			0	0
 WindLightUseAtmosShaders	0	0
 RenderDeferred				0	0
 RenderDeferredSSAO			0	0
@@ -393,7 +383,6 @@ list NoVertexShaders
 RenderAvatarVP				0	0
 RenderAvatarCloth			0	0
 RenderReflectionDetail		0	0
-VertexShaderEnable			0	0
 WindLightUseAtmosShaders	0	0
 RenderDeferred				0	0
 RenderDeferredSSAO			0	0
diff --git a/indra/newview/featuretable_mac.txt b/indra/newview/featuretable_mac.txt
index 68202a571f..bac6fd5708 100644
--- a/indra/newview/featuretable_mac.txt
+++ b/indra/newview/featuretable_mac.txt
@@ -56,7 +56,6 @@ RenderVBOMappingDisable		1	1
 RenderVolumeLODFactor		1	2.0
 UseStartScreen				1	1
 UseOcclusion				1	1
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 WLSkyDetail					1	128
 Disregard128DefaultDrawDistance	1	1
@@ -95,7 +94,6 @@ RenderTerrainLODFactor		1	1
 RenderTransparentWater		1	0
 RenderTreeLODFactor			1	0
 RenderVolumeLODFactor		1	0.5
-VertexShaderEnable			1	0
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -127,7 +125,6 @@ RenderTerrainLODFactor		1	1
 RenderTransparentWater		1	0
 RenderTreeLODFactor			1	0
 RenderVolumeLODFactor		1	0.5
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -158,7 +155,6 @@ RenderTerrainLODFactor		1	1.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	0
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -189,7 +185,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	0
 RenderDeferredSSAO			1	0
@@ -220,7 +215,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	0
@@ -251,7 +245,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	1
@@ -282,7 +275,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	0.5
 RenderVolumeLODFactor		1	1.125
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 RenderDeferred				1	1
 RenderDeferredSSAO			1	1
@@ -312,7 +304,6 @@ RenderTerrainLODFactor		1	2.0
 RenderTransparentWater		1	1
 RenderTreeLODFactor			1	1.0
 RenderVolumeLODFactor		1	2.0
-VertexShaderEnable			1	1
 WindLightUseAtmosShaders	1	1
 WLSkyDetail					1	128
 RenderDeferred				1	1
@@ -374,7 +365,6 @@ list NoPixelShaders
 RenderAvatarVP				0	0
 RenderAvatarCloth			0	0
 RenderReflectionDetail		0	0
-VertexShaderEnable			0	0
 WindLightUseAtmosShaders	0	0
 RenderDeferred				0	0
 RenderDeferredSSAO			0	0
@@ -388,7 +378,6 @@ list NoVertexShaders
 RenderAvatarVP				0	0
 RenderAvatarCloth			0	0
 RenderReflectionDetail		0	0
-VertexShaderEnable			0	0
 WindLightUseAtmosShaders	0	0
 RenderDeferred				0	0
 RenderDeferredSSAO			0	0
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 e93568a87e..131d0024a0 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
@@ -623,23 +623,6 @@
     top_delta="16"
     width="300" />
 
-  <!-- SL-12594, basic shaders always enabled, no fixed-function GL 
-  <check_box
-    control_name="VertexShaderEnable"
-    height="16"
-    initial_value="true"
-    label="Basic shaders"
-    layout="topleft"
-    left="420"
-    name="BasicShaders"
-    tool_tip="Disabling this option may prevent some graphics card drivers from crashing"
-    top_delta="16"
-    width="300">
-    <check_box.commit_callback
-      function="Pref.VertexShaderEnable" />
-  </check_box>
-  -->
-    
   <slider
     control_name="RenderTerrainDetail"
     follows="left|top"