Meshes, multiple lights and advanced shadows?
If this has anything to do with how the SL viewer will work in the future – I’d say this is the right direction :-) :
The pictures come from this extraordinary picasa photo stream sporting 93 images all worth watching. On the other hand some of the pics are from 2008 -I didn’t learn from them until today so I don’t know how this fits in any roadmap.
Here is an video regarding meshes in the SL viewer.