float4 _TerrainBounds;
      float4 _TerrainDesc_TexelSize;

      half4 _TerrainBlendParams;
      half4 _TerrainBlendParams2;
      half4 _SlopeBlendParams;
      half4 _SnowBlendParams;
      half4 _FeatureFilters;

      half _TBNoiseScale;