JCitron: Thanks, Unfortunately, when I start my copy of Trainz22, there is no such entry in the Developer menu.
Nevermind, I misunderstood your instructions and found it once I looked in the right place. I`ll definitely have to play with that!
Edit: P.S.: Thank you for approving of my post in the Terrain Texture Creation thread. It feels good when an established helper such as yourself approves of my meager attempts at help.