Applied Mesh UV-map to Sculpted prim & nothing happened. What did I do wrong?

[Tone Benoir]

Applied Mesh UV-map to Sculpted prim & nothing happened.  What did I do wrong?

[Rolig Loon]

Well, you applied a mesh UV map to a sculpted prim.  Sculpted prims are strange mesh objects.  The UV map that creates a sculpted prim is a texture that maps the prim's shape as an array of color vectors.  When you look at it, the UV map looks like a wildly colored Rorshach test.  When you apply that map in the Object page of your Build/Edit tool, that splash of colors is interpreted to create the sculpty. 

A mesh UV map, on the other hand, is a 2D "unwrapped" representation of the layout of triangles and quads on the mesh object.  It's used to tell where to place textures on its surface, not to define its shape.  It is quite literally a map of the surface of your mesh object.