Hi Jerry,

Within the documentation that comes with Sculptris, there's a section about importing...

Import OBJ - Import an existing OBJ file. Useful if you want multiple objects for sculpting, or somewhat more complex topology than a sphere. Compatibility is limited. Use single closed triangulated mesh(es) without sharp corners, and with less than 24 connections per vertex (no high-resolution spheres, unless they are geospheres)

HTH, Colin