"No, I don't want it to get pornographic, but nudity is not immoral no matter what your parish priests may say. We come into this world nakkid and if we're blessed we actually get to spend time while we're here in that natural and very healthy state."
It may not be immoral but it doesn't scream professional in a business sense.
If this site wishes to attract higher paying ad clients, ShareCG will have to (or should) put nudity restrictions on thumbs in order to appear more business professional friendly. Total artistic freedom does not apply in this circumstance, it does apply on your own sites depending on your website host.
How soon do you think this site would last if the person, whom has that fetish harness here, posted Laura in her normal young teen state nude in that harness? Luckily, that person morphed her into an older look & used a "bodysuit" to cover her parts, so there is no issue BUT what if others in the future are not so careful? There ARE laws that forbid child/minor images that are suggestive/nude/sexual imagery, this includes 3D images. Aiko may be an anime figure but with certain characters, she looks like a child.
Argue til the cows come home for & against nudity, fact is there has to be a line that makes both sides happy & that will appeal to advertisers, not scare them off thinking they hit Renderotica instead.......