The OBJ files aren't exactly what you might think they'd be & if I'm not mistaken, Sculptris won't be able to use them. Think of this image:
That's what the OBJ files look like . I have to admit, it'd have been cool if it were able to convert to a 'real' 3D model. Ah well, it's still useful for inferring between images. In animation, you often see transitions between two views that don't make logical sense (spatially speaking). With some effort, this program can do that.