Portal 2 (engine branch)
From Valve Developer Community
New since the Alien Swarm branch is:
- Improved shadow mapping
- The entity env_projectedtexture is significantly improved. Compared to previous implementations, it has higher default resolution, better edge filtering and support for the caching of shadows from static objects.
- Sound operators
- For defining complex audio behaviour.
- Blob particles
- Used to render paint.
- Video playback on materials
- Added support to render Bink Video in-game on surfaces.
Source code for this branch is not available. However, authoring tools exist for custom content.