3D model created by Space Engine, a freeware 3D space simulation program; contains a spacecraft model referenced during the simulation; similar to .CMOD files; can be customized.

To import your model from the 3D Editor in Space Engine: Save your model as an .OBJ file. Place the OBJ file in the data\models\spacecrafts\modelname\ folder. Add the ship script and run Space Engine. The OBJ file will be loaded and saved as a SM file, after the SM file is created, you can remove the OBJ file. To update your model, delete the SM file and repeat this process with your new OBJ file. NOTE: SM files are loaded into Space Engine through .SC files.

Song file format used by StepMania, a dance and rhythm game that supports dance pad input; includes song information and references to music and image files; may be used for dance, pump, beat, and guitar songs.

SM files are saved in a text format and include several lines that begin with "#" followed by a specific tag. Examples of tags include TITLE, ARTIST, BACKGROUND, MUSIC, and BPMS. Each tag is followed by a value, such as a name, number, or filename.