AnimatorSystems test.

P4 sync:
- LOD testing.
- AnimatorSystems test setup.
- AnimationTime and AnimationIndex per mesh.
- Vector encoding/decoding.

Runtime/Shaders/HLSL/SampleTexture2DArrayLOD.hlsl

@@ -0,0 +1,12 @@
+// References: 
+// https://forum.unity.com/threads/hdrp-shader-graph-hybrid-instanced-instancing-now-working.886063/
+
+#ifndef SAMPLE_TEXTURE2D_ARRAY_INCLUDED
+#define SAMPLE_TEXTURE2D_ARRAY_INCLUDED
+
+void SampleTexture2DArrayLOD_float(Texture2DArray TextureArray, float2 UV, SamplerState Sampler, uint Index, uint LOD, out float4 RGBA)
+{
+	RGBA = SAMPLE_TEXTURE2D_ARRAY_LOD(TextureArray, Sampler, UV, Index, LOD);
+}
+
+#endif