This coan not be done in general. However Jass and Primstar supply a “sculptify Objects…” function. This function can convert meshes to sculpted prims if they comply to the following constraints:
- The mesh does not contain any holes.
- The mesh can be unwrapped to a UV Map with only one island.
- The mesh can be unfolded to a checker board like map.
- The mesh only contains Quads.
Note: In some cases the “sculptify object” function can create an “initial UV Map” which would need some manual tweeking in order to work properly as sculpted prim.
Here are some tutorials: