#if _ALPHAHOLETEXTURE
         TEXTURE2D(_AlphaHoleTexture);   // must declare with a sampler or windows throws an error, which seems like a compiler bug
         float4 _AlphaHoleTexture_TexelSize;
      #endif



      void ClipWaterLevel(float3 worldPos)
      {
         clip(worldPos.y - _AlphaData.y);
      }

      void ClipAlphaHole(inout Config c, inout half4 weights)
      {
      #if _ALPHAHOLETEXTURE
         clip(SAMPLE_TEXTURE2D(_AlphaHoleTexture, shared_linear_clamp_sampler, c.uv).r - 0.5);
      #else
         if ((int)round(c.uv0.z ) == (int)round(_AlphaData.x))
         {
            clip(-1);
         }
         else if ((int)round(c.uv1.z ) == (int)round(_AlphaData.x) && weights.y > 0)
         {
            weights.y = 0;
            weights = TotalOne(weights);
         }
         else if ((int)round(c.uv2.z ) == (int)round(_AlphaData.x) && weights.z > 0)
         {
            weights.z = 0;
            weights = TotalOne(weights);
         }
         else if ((int)round(c.uv3.z ) == (int)round(_AlphaData.x) && weights.w > 0)
         {
            weights.w = 0;
            weights = TotalOne(weights);
         }
         
      #endif
      }