You can estimate mip levels per triangle and subdivde them based on the wanted mip level across z lines, instead of doing the calculation per pixel. It's a bit

You can estimate mip levels per triangle and subdivde them based on the wanted mip level across z lines, instead of doing the calculation per pixel. It's a bit wonky, but can work, at least for the bigger triangles. I've linked some code that does something along those lines for mipmapping [1]. [1] https://github.com/Gil-AdB/REVIVAL/blob/0da65f18a34b74575a89694d21c9058f20f75f18/FDS/FRUSTRUM/FRUSTRUM.CPP#L454 https://github.com/Gil-AdB/REVIVAL/blob/0da65f18a34b74575a89...