Merge branch 'v2' of https://github.com/Unity-Technologies/PostProcessing into v2

Author: gokselgoktas

PostProcessing/Runtime/Effects/TemporalAntialiasing.cs

@@ -69,9 +69,11 @@ internal void ResetHistory()
 
         Vector2 GenerateRandomOffset()
         {
+            // The variance between 0 and the actual halton sequence values reveals noticeable instability
+            // in Unity's shadow maps, so we avoid index 0.
             var offset = new Vector2(
-                    HaltonSeq.Get(m_SampleIndex & 1023, 2),
-                    HaltonSeq.Get(m_SampleIndex & 1023, 3)
+                    HaltonSeq.Get((m_SampleIndex & 1023) + 1, 2) - 0.5f,
+                    HaltonSeq.Get((m_SampleIndex & 1023) + 1, 3) - 0.5f
                 );
 
             if (++m_SampleIndex >= k_SampleCount)

PostProcessing/Runtime/PostProcessRenderContext.cs

@@ -127,7 +127,6 @@ public void Reset()
 
             resources = null;
             propertySheets = null;
-            userData = null;
             debugLayer = null;
             isSceneView = false;
             antialiasing = PostProcessLayer.Antialiasing.None;