Fix for GLTF scenes not uploading (#1994)

indra/newview/gltf/asset.cpp

@@ -991,6 +991,12 @@ bool Image::prep(Asset& asset)
         return false;
     }
 
+    if (!asset.mFilename.empty())
+    { // local preview, boost image so it doesn't discard and force to save raw image in case we save out or upload
+        mTexture->setBoostLevel(LLViewerTexture::BOOST_PREVIEW);
+        mTexture->forceToSaveRawImage(0, F32_MAX);
+    }
+
     return true;
 }
 

indra/newview/gltfscenemanager.cpp

@@ -148,6 +148,16 @@ void GLTFSceneManager::uploadSelection()
                     raw = image.mTexture->getRawImage();
                 }
 
+                if (raw.isNull())
+                {
+                    raw = image.mTexture->getSavedRawImage();
+                }
+
+                if (raw.isNull())
+                {
+                    image.mTexture->readbackRawImage();
+                }
+
                 if (raw.notNull())
                 {
                     LLPointer<LLImageJ2C> j2c = LLViewerTextureList::convertToUploadFile(raw);