Do not flip water mask, batch table or OIT framebuffer textures.

Source/Scene/BatchTable.js

@@ -371,7 +371,8 @@ define([
             sampler : new Sampler({
                 minificationFilter : TextureMinificationFilter.NEAREST,
                 magnificationFilter : TextureMagnificationFilter.NEAREST
-            })
+            }),
+            flipY : false
         });
     }
 
@@ -456,7 +457,7 @@ define([
                '    float numberOfAttributes = float('+ stride + '); \n' +
                '    float xId = mod(batchId * numberOfAttributes, batchTextureDimensions.x); \n' +
                '    float yId = floor(batchId * numberOfAttributes / batchTextureDimensions.x); \n' +
-               '    return vec2(centerX + (xId * stepX), 1.0 - (centerY + (yId * stepY))); \n' +
+               '    return vec2(centerX + (xId * stepX), centerY + (yId * stepY)); \n' +
                '} \n';
     }
 

Source/Scene/GlobeSurfaceTile.js

@@ -668,7 +668,8 @@ define([
                     height : textureSize,
                     arrayBufferView : waterMask
                 },
-                sampler : waterMaskData.sampler
+                sampler : waterMaskData.sampler,
+                flipY : false
             });
 
             texture.referenceCount = 0;

Source/Scene/OIT.js

@@ -111,29 +111,19 @@ define([
     function updateTextures(oit, context, width, height) {
         destroyTextures(oit);
 
-        // Use zeroed arraybuffer instead of null to initialize texture
-        // to workaround Firefox 50. https://github.com/AnalyticalGraphicsInc/cesium/pull/4762
-        var source = new Float32Array(width * height * 4);
-
         oit._accumulationTexture = new Texture({
             context : context,
+            width : width,
+            height : height,
             pixelFormat : PixelFormat.RGBA,
-            pixelDatatype : PixelDatatype.FLOAT,
-            source : {
-                arrayBufferView : source,
-                width : width,
-                height : height
-            }
+            pixelDatatype : PixelDatatype.FLOAT
         });
         oit._revealageTexture = new Texture({
             context : context,
+            width : width,
+            height : height,
             pixelFormat : PixelFormat.RGBA,
-            pixelDatatype : PixelDatatype.FLOAT,
-            source : {
-                arrayBufferView : source,
-                width : width,
-                height : height
-            }
+            pixelDatatype : PixelDatatype.FLOAT
         });
     }
 

Source/Shaders/GlobeFS.glsl

@@ -183,6 +183,7 @@ void main()
     vec2 waterMaskTranslation = u_waterMaskTranslationAndScale.xy;
     vec2 waterMaskScale = u_waterMaskTranslationAndScale.zw;
     vec2 waterMaskTextureCoordinates = v_textureCoordinates.xy * waterMaskScale + waterMaskTranslation;
+    waterMaskTextureCoordinates.y = 1.0 - waterMaskTextureCoordinates.y;
 
     float mask = texture2D(u_waterMask, waterMaskTextureCoordinates).r;