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More shadows

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This is a cathedral mesh I've created for the shadows demo I'm making. There's about 5000 triangles in this scene. It's lit with 2 lights; a positional light inside the cathedral and a directional light for the sun.

ATM I'm just using OpenGL's vertex lighting, but I'll probably put in a bump-mapping pixel shader if I can get the frame rate to improve.

I'm not recalculating a shadow volume unless the light or the mesh moves, which is a lot more efficient, particularly for this type of scene. Fill rate is still proving to be a major pain in the ass in antialiased modes though; with 6xAA, I get about 16fps for the above scene (@1024x768). Without AA, I get ~65fps.
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