I get pure white instead of pure black now. Plain old GeForce 3, 64mb. I had my friend test it as well, he got the same pure white result on his GeForce Ti4600 128 MB.

I just have to tell you how awesome I think it is that you're working so hard on this. I really wish I could help but I have absolutely no knowledge of shaders. The most I can do is say how much I appreciate your effort on this.

I can't wait to have a real water effect on my useless GF3!