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accepted why would you use textures that are not a power of 2?
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comment How do I compute the point of a triangle-ray intersection?
@Anko kind of true, but on the other hand, cameras are not well approximated by a point if you want to avoid front plane clipping glitches; if you're doing true 3D movement in a 3D world, you end up having to do approximate something bigger than a point eventually.
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answered How do I compute the point of a triangle-ray intersection?
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comment How do I compute the point of a triangle-ray intersection?
Have you Googled "ray triangle intersection"? Ray will likely get more hits than vector, and there are lots of articles and sample code out there.
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accepted Can you have shader variables that vary per primitive?