Abel wrote:Isn't that exactly where the alpha channel comes in? I agree that with very dark sections of an image one should not ignore that area, but if large parts of the output are transparent I cannot imagine anyone wanting that transparent area to be considered black for tonemapping purposes.
I think we'll find out that it's not always the case, and as thomas pointed out, using the alpha value would ruin renders not using premultiplyalpha.
Jeanphi
