Rice said:
You're using a wrong combiner for your video card.
Rice, i'm not sure that it is that, i also get this problem (radeon 9000 pro), on limited 2 stage combiner, i even get errors on pixel shader, though not as bad, as i'll demonstrate in the next two screenies...
first one is pixel shader, notice that the elephant guy (forgot his name) looks wrong, check jabos for what he should look like.
in the second shot the same char is all black (limited two stage combiner);
Also i'm not sure whether the fog color and distance is correct here...
During the intro just after starting the game, you cannot see the first little bit, its too dark, happens on both combiners.
EDIT:I added a 3rd screenshot (from jabos), where the char looks correct, the fog looks more correct as well.