I had to admit TSRE5 is well done route editor but on this week i've suffer a bit
The main problem was tiles and quad tree.
A brief of this problem is the creation of tiles while they are deleted.
After to manually delete unnecesary tiles, they aren't created again.
This situation forces me to create the terrain again and import the important files. (just like a temporary route).
Also i figure out yesterday exist some bug. Using a clean route terrain and quad tree don't generate new tiles.
As a suggestion there should be like a special window to display quad tree with tiny thumbnail of the terrain to easy delete, modify and create tiles.
PD: Using lastest version and sorry for no evidence.
Maybe a Quad Tree Problem
I don't see a problem. You have to show me some examples.