What sort of computer graphics projects are appropriate for original undergraduate research?

Not all types of projects are appropriate for undergraduates, with respect to original research. Some may be too lengthy, and not doable within a semester or two, which is the amount of time most undergraduates can allot. Some may be too complex, and beyond the abilities of undergraduates. So, here's where we all get to throw in ideas for topic areas, themes, whatever, that are, to quote Littel Bear, "Just right!"

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