Hello Sir,

A partial answer:

- make a 3D silhouette into Sketchup (see tuto 'Google Sketchup 2D People Part 1' here http://www.sweethome3d.com/support/foru ... hread,4926 )
- export it as .kmz file
- load it into SH3D

Transparency and shadows will be ok.
You won't have the 'always facing camera' feature.

Hope this helps.
Phil