A sculpted prim, or sculpty, is a Prim that has been modeled, morphed, shaped, whatever to the creators liking. A sculpty can do what most default in-world prims can't. Programs such as SculptyPaint, Blender, Maya and more can be used to sculpt. To apply a sculpt in-world, you need to upload the sculpty texture that was created from the sculpting program you are using. Sculpty textures can be uploaded the same way as images can be uploaded.