A glass of water
I just found a tutorial about Mental Ray, and creating Caustics. It's great. You can find the link in my posting in the Mental Ray-section. (Sorry, but I haven't got it at hand).
Anyway, I tried to do a glass of water standing on a wooden table, with a spotlight coming from the top-right direction. What do you guys think about it?
CREDITS: The original model is from the tutorial and is not my work. I just played with it to get a nicer look.