[caldrail]

Most of us have experienced the same problem. Partly that's the reality of PC games, in that the more detailed the game is, in terms of a mission, the more work the PC has to do. Also, some things like clouds reduce frame rate a lot. Lastly, modders don't help. Because they tend to want to to impress us with massively detailed textures, they invariably use larger ones and ignore the extra loading and display times these mega-textures require. It's not a new problem, and not confined to Il2, which actually limits the excesses that modders can get up to. You should see the situation in the train simming arena. I see 2048x2048 textures that are basically one colour. Ridiculous.