Spline file created by OMSI The Bus Simulator, an omnibus driving simulation program; similar to other OMSI configuration files like .HUM, .SLI, .SCO, and .BUS files; holds configuration data that guides human and Artificial Intelligence (AI) traffic during gameplay, for e.g., the roads; can be customized.

The OVH file is made up of lines of data following a keyword (whether it's for height profiles, textures, graphical lanes, or paths). The format looks like this: [keyword] 1 2 3 An example of a Height Profile SLI file looks like this: [heightprofile] -8.000 - First X-coordinate (begin) -4.000 - Second X-coordinate (end) 0.500 - Height on First coordinate 0.250 - Height on Second coordinate OMSI will only read lines of data that are in this format.