upgrade to 2021.2

Assets/Scenes/MNML_TubeTerrain/cube.mat

@@ -9,7 +9,7 @@ Material:
   m_PrefabAsset: {fileID: 0}
   m_Name: cube
   m_Shader: {fileID: 4800000, guid: 6e4ae4064600d784cac1e41a9e6f2e59, type: 3}
-  m_ShaderKeywords: _DISABLE_SSR_TRANSPARENT _EMISSION _NORMALMAP_TANGENT_SPACE
+  m_ShaderKeywords: _DISABLE_SSR_TRANSPARENT _NORMALMAP_TANGENT_SPACE
   m_LightmapFlags: 1
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0
@@ -152,6 +152,7 @@ Material:
         m_Texture: {fileID: 0}
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
+    m_Ints: []
     m_Floats:
     - _AORemapMax: 1
     - _AORemapMin: 0
@@ -185,6 +186,7 @@ Material:
     - _DisplacementLockTilingScale: 1
     - _DisplacementMode: 0
     - _DoubleSidedEnable: 0
+    - _DoubleSidedGIMode: 0
     - _DoubleSidedNormalMode: 1
     - _DstBlend: 0
     - _EmissiveColorMode: 1
@@ -303,4 +305,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: da692e001514ec24dbc4cca1949ff7e8, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  version: 11
+  version: 12
+  hdPluginSubTargetMaterialVersions:
+    m_Keys: []
+    m_Values: