One thing I still don’t understand at all is (assuming the picture of Martin is accurate or very close to what happens internally):
Isn’t that basically what happens when we set the LP to be smooth (if we don’t subdivide the LP mesh a few times) ? And if so, why do we not run into the problem of flat surfaces appearing to be slightly rounded (as the angle of rays hitting the LP changes from the vert to the center of the face)?
