//output.height = lerp(lerp(a, b, localUV.x), lerp(c, d, localUV.x), localUV.y);
    //output.height = _HeightMap.SampleLevel(MyPointRepeatSampler, uvSphere, 0).x;
    //output.height = tex2Dlod(_HeightMap2, float4(uvSphere, 0, 0)).x;
        float a = _HeightMap.Load(int3(coord.x, coord.y, 0)).x;