So much drama because of that AI !

you have to ask your self about : 

When making Poser art with purchased models is your creation intellectually yours ? Nor really as you are not the Intellectual owner of the 3d meshes used for your work ! You can't clame it as yours's, you sort of made fan art. Rules are the same for Poser, DS, AI etc. 

If you make a Outfit based on V4 Bones is that outfit yours ? Not really Intellectual rights still go to the V4 owner. This are actually your rules !  So what is really yours on the "derived Art" you make ? I Mean Derived as most you used in Poser, Daz, Ai is not Intellectually yours and never will be as you are not the real creator.

Making it simple, The signature is yours, weather a Dirivitive Artwork, a Fan Art, a Ai. The Print is yours if you sign it . But wat you used is Derivative Art nothing else. So Poser is in the same boat like Ai, not more rights, probably even less as AI that might have results that are more unique then the Derived stuff made in Poser DS in witch you have no Intellectual rights.