Trying to change the flake shape to a circle. but when I have an overlaying material it doesn't work. Any ideas?
KeyShot assumes that the flake is a square plane. You'll need an opacity texture (white visible, black transparent) of a circle to make it look round.
tried that too. doesn't help. either way the problem exists when there are two overlaying materials. When it's just one it's ok.
Did few tests and it seems to be a bug. Recomend to write directly to Luxion.