It's easy to tell who a sculptor is. When they are done they leave behind a large lump of some sort. It might be a statue of a model complete with three eyes, four arms, five breats, and six feet -- use know, the usual. Or the sculptural lump might be an abstract representation of a Glorkian nurgdo'k ritual.

Whatever the lump, if there is one, then there is a good chance the individual involved is a sculptor.

If you are one of these type folks that do work in the science fiction genre, then you should be listed.