public void AddAlphaQuad(int x, int y, GroundMasks.UVData uvs)
 {
     alpha.AddQuad(x, y, uvs);
     tileCount++;
 }
 public void AddOpaqueQuad(int x, int y, GroundMasks.UVData uvs)
 {
     opaque.AddQuad(x, y, uvs);
     tileCount++;
 }