I am experiencing a visual/environment bug in Train Simulator Classic where winter textures are not displayed in Quick Drive, even when the season is set to Winter. When starting a Quick Drive with the season set to Winter, the environment loads with summer / non-winter textures — no snow on the terrain or vegetation — even though winter is selected. This makes the route look like spring or summer instead of winter.
It is dependent on the Track in a Route - the Snow is a Texture - If there is no Texture for Winter you don't get snow on the track
Thanks for the explanation — that makes sense. So if I understand correctly, this route simply does not include winter texture variants for terrain/vegetation, which is why selecting Winter in Quick Drive does not visually change anything. In that case this is not really a bug in the game or in Armstrong Powerhouse, but a limitation of how the route was built and which seasonal textures were provided by the route author. That explains why winter works on some routes and not on this one.