.DMX File Extension
File TypeSource Filmmaker Project File
What is a DMX file?
Project file created by Source Filmmaker (SFM), a program used for making 3D movies and still images for use with Valve's Source game engine; saves a 3D recording created by the user and can be comprised of game map objects, models, animations, sounds, effects, and other 3D model data; often contains a recording of actual gameplay.
NOTE: Source Filmmaker can only be installed using Valve's Steam client.