I've got Strike Fighters 2 Europe pretty much completely vanilla, not played it much. I recently updated it to the latest version, and the performance is so much better for me that it ever used to be I thought I'd give the game another go. 
  
I was looking for a terrain mod to update the unpleasantly low-res stock GermanyCE terrain and stumbled across Stary's hi-res mod here at this very site. I've installed it in accordance with the instructions, and I've made sure my Terrain Detail is set to unlimited. However in some missions I'm definately NOT seeing the updated tiles, it seems to depend on season. I get the hard winter tiles in February, but in October I just see the stock tiles. 
  
Anything in particular I should have done when installing the mod that's not mentioned in the docs?