Below is a high definition video tutorial showing how to create 3d prim sculpts using 3d Max and PrimComposer.

The video tutorial is a step by step guide starting with an image. It is actually in two parts of 8 minutes each.

Check it out below.

Creating 3d Prim Sculpts for Second Life Using 3d Max & PrimComposer: HD Video Tutorial Part 1

HD Video Tutorial Part 2: Creating 3d Lemon from Image