Portal 2 (engine branch)

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The Portal 2 Engine Branch was introduced with [Portal 2] Portal 2 in 2011. It succeeds the Alien Swarm engine branch.

Features

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.

Availability

Source code for this branch is not available. However, authoring tools exist for custom content.