Source Filmmaker (abbreviated as SFM) is a video capture and editing application that works from inside the Source game engine.[6][7] The tool, created by Valve Corporation, was used to create over 50 animated shorts for its Source games, including Team Fortress 2, the Left 4 Dead series, and Half-Life 2. On June 27, 2012, Valve released a free open beta version of the SFM to the gaming community via its Steam service.
A worthy replacement for Garry's Mod and Blender.
If this returns in Source 2, it will be a dream come true. Source filmmaker is like gmod but for Filmmakers where any possibility is possible with the knowledge of how to use this hardware.
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Very powerful animation program