Make ball opaque (#870)

Author: awjuliani

unity-environment/Assets/ML-Agents/Examples/SharedAssets/Materials/Ball.mat

@@ -8,13 +8,12 @@ Material:
   m_PrefabInternal: {fileID: 0}
   m_Name: Ball
   m_Shader: {fileID: 46, guid: 0000000000000000f000000000000000, type: 0}
-  m_ShaderKeywords: _ALPHAPREMULTIPLY_ON _EMISSION
+  m_ShaderKeywords: _EMISSION
   m_LightmapFlags: 1
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0
-  m_CustomRenderQueue: 3000
-  stringTagMap:
-    RenderType: Transparent
+  m_CustomRenderQueue: -1
+  stringTagMap: {}
   disabledShaderPasses: []
   m_SavedProperties:
     serializedVersion: 3
@@ -59,19 +58,19 @@ Material:
     - _BumpScale: 1
     - _Cutoff: 0.5
     - _DetailNormalMapScale: 1
-    - _DstBlend: 10
+    - _DstBlend: 0
     - _GlossMapScale: 1
     - _Glossiness: 0
     - _GlossyReflections: 1
     - _Metallic: 0
-    - _Mode: 3
+    - _Mode: 0
     - _OcclusionStrength: 1
     - _Parallax: 0.02
     - _SmoothnessTextureChannel: 0
     - _SpecularHighlights: 1
     - _SrcBlend: 1
     - _UVSec: 0
-    - _ZWrite: 0
+    - _ZWrite: 1
     m_Colors:
     - _Color: {r: 0, g: 0, b: 0, a: 1}
     - _EmissionColor: {r: 1.1886792, g: 0.56508875, b: 0.1738163, a: 1}