It's incredibly difficult. I've always solved the problem before by simply not letting the fish get too close to the bottom. If you look at a real saltwater aquarium, the light is so diffuse that any fish which is more than an inch off the floor wil not cast any shadow at all.
But with the new tank, there will be instances when the fish (and other creatures) will get right down to the bottom, so I will end up having to create a way of doing shadows.
Last edited by Jim Sachs; 08-11-2009 at 10:15 PM.
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