upgrade to 2021.2

Assets/Scenes/MNML_TubeTerrain/Ground.mat

@@ -12,7 +12,10 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: da692e001514ec24dbc4cca1949ff7e8, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  version: 11
+  version: 12
+  hdPluginSubTargetMaterialVersions:
+    m_Keys: []
+    m_Values: 
 --- !u!21 &2100000
 Material:
   serializedVersion: 6
@@ -129,6 +132,7 @@ 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
@@ -160,6 +164,7 @@ Material:
     - _DisplacementLockTilingScale: 1
     - _DisplacementMode: 0
     - _DoubleSidedEnable: 0
+    - _DoubleSidedGIMode: 0
     - _DoubleSidedNormalMode: 1
     - _DstBlend: 0
     - _EmissiveColorMode: 1