public void RequestRegion(Rect r, int mipMap, int numMips)
 {
     if (IsValid() == false)
     {
         throw new InvalidOperationException("Invalid ProceduralTextureStack");
     }
     ProceduralVirtualTexturing.RequestRegion(handle, r, mipMap, numMips);
 }
 public void RequestRegion(Rect r, int mipMap, int numMips)
 {
     ProceduralVirtualTexturing.RequestRegion(handle, r, mipMap, numMips);
 }