Having a tool that can import any kind of DEM into Train simulator was my dream since I've started to use the route editor about a year ago (there is most likely a feature request somewhere). Now I finally know enough about programming and DEM processing to make such tool myself using C# and GDAL. Here is a first successfull example of importing a 10 meter DEM of Austria into Train simulator. The main problem to solve at the moment is it's speed which is also the reason why I have imported such small piece of land (it took about 20 minutes). My ultimate goal is to make it into a command line application with only route location and DEM location as arguments. This is also a prerequisite for a route merging tool with support for multiple origins that I want to make eventually. I have attached the source code of this early version in case anyone wants to take a look at it or use it in a hacky way. It's mostly commented but I was a bit too excited at the end when the thing started to make sensible outputs.