There is a Renderosity account option to NOT view nude images.  Perhaps OP'er could check whether own account settings have been switch to not show nude images. Nothing personal intended here, don't take this comment wrongly, please..

Personally, I value such an optional viewing function, because I don't want to be browsing a nude promo image when I am travelling in say, a conservative country where strict rules about such matters apply.

Eternal Hobbyist