Lots of stuff going on that is affecting FPS in my clean re-install of BAT up to 3.4. Here are some interesting missions:
1) Mission 1: Net6Island (Square Online Island), several P-40s escorting several Blenheims; defense by several Bf109s. 1 FPS slideshow in BAT, video quality in SAS 4.12.2m and Stock 4.13.3m.
2) Mission 2: Stock Normandy map with small island; Omaha beach intense mission. You fly P51s along with P47s. Somehow this works better in BAT with 8 to sometimes 20 fps. Makes no sense, but there are no trains. Much better in SAS and Stock.
3) Mission 3: Stock Net 1 Summer map; intense 72 aircraft air battle of P-47, several Li-2 and G-11 Tugs vs IAR80s and Me210s. Works ok in BAT, much better in SAS and Stock.
4) Mission 4: Iwo Jima map. Does not even load in BAT. Works well in SAS and Stock.
Anyway, any input is welcome to try to figure out what is causing such lag in BAT 3.4, at least for a couple of individuals here.
http://www.uberdemon.net/pictures/FPSProblems/OtherMissions.zipMissions, briefings and log files for each of the missions included for your testing.
In all truth, the missions we have been discussing all look like HD TV in SAS 4.12.2m and Stock version of IL-2 1946 4.13.3m, in 1920 x 1080 with perfect graphic settings. I would imagine that there should not be that much discrepancy.
I'd love to get that kind of performance, or at least not as bad in BAT 3.4