Thanks for the info guys. I'll have to think about the best way forward a bit. I'm still hesitant to add generic vertex attributes just because it seems like it would add to a given node's memory usage and since I don't use the node's color values for anything other than lookup table purposes I might as well store stuff in those colors since everything I draw is going to have to have memory allocated for colors no matter what. I would also like to think that the code I'm writing will always be used on newer GeForce cards, I don't think that I can know that for certain as it would ultimately be distributed to some not-so-powerful computers to run on.
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