The Source engine is a 3D game engine developed by Valve Corporation. Its unique features include a large degree of modularity and flexibility, an artist-driven, shader-based renderer, accurate lip sync and facial expression technology, and a powerful, efficient and completely network-enabled physics system.
Just follow through these three videos, and you will have a mod that you are able to add custom code into. Since I was tired of looking for video tut's...
This advanced tutorial will show you how to rig, animate, and integrate mocap data for the purpose of exporting to Valve's Source engine.
We've posted Ross Scott's "Source Machinima Cinematography" tutorial on design3.com
Learn how to create custom animations and use mocap data in the Source engine.