@Juliean Hmm ok, worth thinking about. I'm going to experiment a bit today and see how it'll turn out.

@Juliean 

omg thank you so much ?????

@ddlox thank you for taking the time out to answer, your answer is perfect. have a great day

a light breeze said:

_Flame_ said:
G=normalize(N.xy)*sqrt(N.z*0.5+0.5)

Given the above formula, I would expect an artifact at N.xy = (0, 0), since you can't normalize a zero vector.  This seems consistent with your images, where the problem seems to be concentrated at a single point.  Have y…