I think that the basic rule of thumb to follow is this: After you "create" something and want to distribute OR sell it, consider this: Did you base your work on something else that someone else is selling? If someone downloaded your thing, would they be able to remove the parts that you created or in some way reverse engineer the thing and just have the thing that someone else is selling? If you can answer no to that then you're safe. That's why distributing textures is safe... No matter how you made them, you can't build an object just from knowing what the texture template was shaped like, so your not giving away something that someone would normally have to buy elsewhere. That's why you can sell objects constructed of primatives.. Nobody sells primatives, so you're not stealing the "sphere" profits from anybody else. That's also why you can't sell Zygote models with your own morphs applied. If people start buying your model and just removing your morphs, they've got Zygote's product, and never had to pay them for it. Anyway... I think that as long as you keep this in mind, the copyright issue will never give you a problem.