There is a simple solution -
The World Origin.
To explain: I had an old prototypical main line route (127km in length) that I created years ago and I wanted to add a prototypical branch line (88km in length - so it is not a small branch). I created the branch line as a separate route with the intention of merging it with the main line route when finished. After completing all the terraforming (at the correct heights) and adding the track work to the branch line I did a test merge to discover that the original mainline was hundreds of metres below the correct height resulting in a huge cliff at the merge point.
Panic set it. How to fix this? After a few glasses of a good red wine (at my age it helps reboot the brain cells) I came up with a possible solution - using the
World Origin.
I added a
World Origin marker (
Edit Menu,
Edit Environment...,
Location tab) to the main line route at the main station and set its altitude according to the calculation:-
- actual map altitude at that spot is 538m
- Trainz ground height at the same spot was 55m
- the difference (538-55) was 483m
The World Origin altitude setting was entered as 483. This set the Trainz height at that point to 538m. Mainline route was saved.
Test merge was attempted again and the difference in the heights at the merge point was a few metres only, easily fixed by some height adjustments and smoothing.