private void RunKernel()
{
var groupSize = BufferUtil.GetThreadGroupSizes(compute, mainKernel);
var groups = new IntVector3(rentex.width, rentex.height, 1) / groupSize;
compute.Dispatch(mainKernel, groups.x, groups.y, groups.z);
material.SetTexture("_MainTex", rentex);
display.material = material;
widgetDisplay.mat = material;
widgetDisplay.tex = rentex;
}