There is only one file type that uses the .TERRN extension:
Rigs of Rods Terrain File
Terrain file used by Rigs of Rods (RoR), a vehicle simulator based on soft-body physics; contains information that describes the terrain, which includes the terrain name, the associated .CFG file name, whether there is water, color of the sky, placement of objects or trucks, and spawning positions.
NOTE: The TERRN file was replaced by the .TERRN2 file in version 0.4 of the simulator and is not supported by the most recent version of Rigs of Rods.
|Rigs of Rods||Open Source|
Updated: October 20, 2015