If you have a basic model of your sculpture and would like to quickly get the image into a 3d package like 3DS Max (without spending 4,000 USD on a MicroScribe arm) you can purchase a piece of software called iModeler from UZR.
It costs about 700 (USD), but it generates a decent 3d model from a series of digital photos taken at several angles. I have used the software and it is very good at building a basic 3d models. I don't use it myself because my sculpture tends to have deep spaces that the software can't model. Also, I don't recommend it if your intent is to scan in models for any kind of animation -- if that is your intent buy a MicroScribe.
Anyways, it's worth taking a look: