Hello,

Thanks for the tips! The image i'm trying to get is of an island with some vegetation on it. I did the vegetation with Paint FX and I was just simply unable to get a good alpha of just the paint FX and their shadows, so what I did was I rendered a pass with both the island and the paint FX (top pic):

https://animation.filmtv.ucla.edu/stu...na/alpha2.html

The problem I am having now is getting a good ocean pass. The biggest problem is getting rid of the Sky portion of the Water/Sky envFog Material. Even if I set it to just Water, there still seems to be some Sky fog showing up. The pic you see here of the alpha channel had the levels adjusted in photoshop to more clearly show the lingering fog. The last pic I tried rendering against a white background, but that didn't work either. I have no idea where to go from here, any help would be greatly appreciated. Thanks!