fix up typo.

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Util/MatrixNames.cs

         public const string Model = "UNITY_MATRIX_M";
         public const string ModelInverse = "UNITY_MATRIX_I_M";
         public const string View = "UNITY_MATRIX_V";
-        public const string ViewInverse = "UNITY_MATRIX__I_V";
+        public const string ViewInverse = "UNITY_MATRIX_I_V";
         public const string Projection = "UNITY_MATRIX_P";
         public const string ViewProjection = "UNITY_MATRIX_VP";
         public const string ModelView = "UNITY_MATRIX_MV";
     }
-}
+}

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Util/ShaderGenerator.cs

 
         public static string EmitTransform(TransformDesc[] matrices, TransformDesc[] invMatrices, string variable, bool isAffine, bool inverseTranspose)
         {
+            // Use inverse transpose for situations where
+            // scale needs to be considered (normals)
+
             if (isAffine)
             {
                 variable = string.Format("float4({0},1.0)", variable);
                 {
                     matrix = "(float3x3)" + matrix;
                 }
+
+                // if the matrix is NOT a transpose type
+                // invert the order of multiplication
+                // it is implicit transpose.
                 if (m.transpose)
                     inverseTranspose = !inverseTranspose;
                 variable = inverseTranspose