Why are mirrors so much better in F-5E then in other modules?

[DmitriKozlowsky]

I generally dislike pit mirrors in DCS. I get robbed of 10-20 FPS depending on module, and they look weird, as their rez does not appear to be same as rest of DCS. Except in F-5E! in F-5E, mirrors look natural, and I don't loose FPS. Maybe 1-5 FPS, but not noticeable. So whats the secret of F-5E mirrors? They are so good in F-5E module, but not so much in others.

[Hiob]

I can only agree on the resolution of the mirrors. 

And the perf hit seems a little bit smaller for the given quality. (10% for me on PG).

But other than that… same sub par performance as most other mirrors. When you move your head closer, the exact opposite of what is to expect happens. Your head and the world get smaller and moves away.