Check out this website I found at code.msdn.microsoft.com
SILVERLIGHT 5, as shown at MIX in Las Vegas
This sample shows a full 3D realtime engine with some advanced features and an integrated collisions system.
The engine provides support for:
•Collisions
•Diffuse channel
•Ambient channel
•Textures (including light maps)
•Per-pixel & per-vertex shader
•Models/cameras and lights