supaweDAD
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first, necroposting (aka posting on a really old and irrelevant thread, the last post on here was more than a year ago) EZ way make a sprite and every time you turn it switch to a new sprite/costume
second, you would have to make 360 costumes if you're just doing one plane of rotation, or 360^2 (360*360) costumes accounting for two planes of rotation (would you want to spend a few years of your life making 129600 costumes just for no one to play your project?)
third, there are already ways to do 3D in scratch