I thought my image would have been ready by now, seems I'm on an exceptionally long shutter speed, though, to take this picture. Probably tomorrow now, it's nearly bedtime for me.
One thing, are you just putting a lake object as the water surface and going beneath it? I couldn't seem to get this to work last time I tried(I can't try now, I'm rendering, but this is just playing on my mind), just a dark surface was visible last time I gave this a shot. Maybe an upside down plane object? Haha! Probably I just missed the 'casts shadows' option on the water object last time I tried, or something.
I didn't even try to get the water surface in this pending render, so, I don't know if this is something that's been fixed since last I tried to do an underwater setting(this was before TG2 was finalized), or some other trick.
I thought that Dune had inverted a camera and rendered the water surface and its adjoined terrain as a separate pass but now, since you both have the same idea, I'm not so sure.
