Whilst embedding OSM2World is not really feasible... looking into it a bit more, it can easily be used to create .obj files using real world map data - so if you want to create a track for that favourite location of yours, this would be by far the fastest way to get it off the ground.
I am not sure about its limits though. It crashed for me when trying to load bangkok.osm (132MB). The crash was due to some NaN values. What an irony, ha ha!