Simple mesh of two vertices vith coordinates (0, 0, 0) and (0, 0, 1) is rotated -20 degrees along X axis and 20 degrees along Y axis. I expected to get steady 45 degrees line on top view, but instead:
Rotation bug.blend (704 KB)
Or do I misunderstand something about the geometry? X and Y coordinates of pick’s vertice are different. Near, but different (0.3213939, 0.3420203, 0,8830221). This causes serious problems on my more complicated model of Rubik’s cube. Its details should be symmetric in all directions, but instead resulting meshes are wry.