Problems with custom textures

In edit mode we can see custom markings and custom painted lines, but when I
build project, load this scenery to MFS2020, and start this scenery in
simulator, the scene has no custom lines and custom markings. Console when
building does not give errors.

Things that come to mind here for me:

  1. The custom ramp IDs have a lower priority layer than the underlying polygon.
  2. Textures for the same is missing/has not been converted properly (check the console window for error messages regarding missing textures).