It says,
"Avatars may not contain any nudity."

That's kinda vague, though, isn't it? What's the Renderosity definition of nudity?
According to dictionary.com, the definition of "nudity" is, "the state of being without clothing or covering of any kind".
So, what parts exactly need be covered and clothed?
This applies only to human depictions?
How do we know?
Like, for example, say I decide I want a 3D sphere to be my avatar... Let's assume I have failed to clothe or cover it. Therefore, I am guilty of a violation of the never-ending, expanding, vague TOS?

of course, the bigger question is, with a million or so pages full of nude digital images in the galleries, what does it matter if the avatars are nude?
I mean, if y'all are going for "respectability" in the world of CG, I could think of many other ways of going about achieving that....