UV - BlenderWiki - understanding UV. From BlenderWiki The most flexible way of mapping a 2D texture over a 3D object is a process called "UV mapping".
In this process, you take your three-dimensional (X,Y & Z) mesh and unwrap it to a flat two-dimensional (X & Y ... or rather, as we shall soon see, "U & V") image. Colors in the image are thus mapped to your mesh, and show up as the color of the faces of the mesh. Use UV texturing to provide realism to your objects that procedural materials and textures cannot do, and better details than Vertex Painting can provide. UV Explained. Sculpted Prims: 3d Software Guide. Stuff to do: Want to help out with this page?
Check out the To-do list. About 3D Modeling Software This page offers a list of 3D modeling software for use with sculpt maps for Sculpted Prims, along with a short explanation of popular 3D file formats. Each entry lists the software package's web site, operating system support, cost and trial versions if applicable, and the licence. Note: Resident-made sculpt map tools and offline previewers now have their own page.