this was interesting

there's a d3d python script called xlc that is more light optiond shortcuts

http://www.youtube.com/watch?v=7GZbHV7MJD4&

Learn how to enable and use Ambient Occlusion for realistic soft shadows between objects.

this one's on light attentuation

http://www.youtube.com/watch?v=ofj-vOgbwsQ&

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