But it can do more than tweaking engine or rims.
It is the full editor system, same as was used for the original LFS cars.
So you can make completely new cars. (but that requires some learning)
See https://www.lfs.net/files/vehmods for list of stuff that people made.
I have decided to completely graphically rework my first mod - Hadimrska Sport. Here is the first preview of the progress in Blender and LFS Editor. It is going to get a completely reworked interior, a new config with roof, a new engine sound, a new steering animation, an optimized texture mappings and many other smaller improvements.
Is there a simple step-by-step way I could reproduce this? Maybe starting from an LFS vehicle, or a test vehicle you could provide?
Based on your description, I added a new texture page, cutout, mapping and triangle, exited back to vehicle editor but didn't get a crash with the Textures tab open.
But if I can reproduce the crash then I can fix it, that's for sure.
Editor crashes when clicking Texture tab (Vehicle Editor).
This happens only when a specific mesh config is selected. Car can be still exported (test) and driven in-game.
Editor sometimes crashes after starting the app, loading the car & clicking the tab, with any config.
After adding some tris with new alpha type texture page & cutout, editor always crashes when clicking Vehicle's Texture tab.
Exporting and selecting the car in-game would make LFS-game crashes as well.