Hello John.

I am seeing green trees around and behind the cargo terminal during winter season, the trees is isolated to that specific area and does not pop up anywhere else.
My theme in the configurator is set to - Winter.

P3D V4.1

Hi Frederik, do you have other Vidan Design sceneries installed? The issue could be caused by a another scenery being active with season set to other than winter. Maybe you could try and move Billund to the top in Scenery Library?