There are some interesting bits of information coming out. I have some here from the Content and Mesh UG.
Sketchup
This is Google’s famous tool for building 3D models. It has a low learning curve and quite a bit of ability. Using it came up in the Content and Mesh Meeting Monday.
Content/Mesh Meeting
It seems people are building things using Sketchup and bringing them into Second Life. All works well until they UNLINK them. A 100 prim Land Impact can jump to 500 prims. The reason is Sketchup makes a model as lots of small parts. When one unlinks the parts all the less than 1 prim costs that were being added together while linked, have nothing to add up with and thus round up to 1. The round up kills the prim savings.