.DMX File Extension

A DMX file is an animation project created by Source Filmmaker (SFM), a tool that allows users to create animated movies using Valve Source engine game assets. It contains an editable movie set within a Team Fortress 2 map. DMX files also contain other Team Fortress 2 game objects, such as characters and items, as well as animations, sounds, and visual effects. The files may also contain recorded Team Fortress 2 gameplay.

SFM is a free program that Team Fortress 2 enthusiasts can use to create animated movies and still images starring the game's characters. To do so, users first import a Team Fortress 2 map, which serves as the setting for their movie. The user can then import and animate Team Fortress 2 characters and items, add sounds to their movie, and add visual effects to their movie.

When a user saves an in-progress SFM movie project, the project is saved as a DMX file. DMX files are comprised of a sequence of shots, which are themselves comprised of the elements mentioned above. Each DMX file's shot sequence appears as an editable timeline in SFM.

After a user finishes creating their SFM movie, they can export the movie as an .AVI video, or they can export one or more scenes from the movie as .TGA still images.

NOTE: You may see DMX files referred to as sessions in SFM's documentation. A DMX file and SFM session are the same thing.

You can open an SFM file in Source Filmmaker (Windows). To do so, select File → Open... from the program's menu bar. Then, navigate to and open your SFM file.