Classic shader problem in a 3D rendering app - when the flat surface meets a curved edge you get a crease along the line. This is because most shadow calculatio

Classic shader problem in a 3D rendering app - when the flat surface meets a curved edge you get a crease along the line. This is because most shadow calculations are done on a per-face basis. In real life, getting such a fine crease is really difficult. In a 3D render? All but certain.