They're sculpted prims in Second Life! By Anjin Meili.

Sculpted prims are very promising for sure, Torley. But I must say, they are still far from getting me excited. The biggest turnoff is, lack of an in-world editor to create sculpted textures. I tried a couple of freebies in May but I wasn't impressed - most of them were not user-friendly tools. I believe we need to wait until Linden Lab develops an in-world ediyor, integrated into the viewer. With 1.19 perhaps?

"in-world editor" of course, not "ediyor"

@invictus: If you look closer at this site, the creator, Anjin Meili, has made his own sculptie inworld editor.