you dont even need intelligence with sculptris. it really does, so much of the work for you. that all you have to do is spend time on it. and you will get something that looks good.
I let a women over 50, that has never drawn at all. and can only partially use her right hand. use sculptris, she had no problems at all making whatever. she said I cant even draw and Im doing this its so easy.
I told her you still cant draw, its the software. essentially doing the work for you. she said yeah, that makes sense. but she enjoyed using it as everyone does