Mapping-fidelity in quadrilateral/triangle rendering

[suucan]

@prisoner849

Maybe bilinear interpolation will help, I’m not sure though.
I tried it here: https://discourse.threejs.org/t/trilinear-interpolation-of-vertices/7991, see the codepen in the PS. But it was made in vertex shader with a segmented plane.

Thank you for the link. That helped me!