Think I have found what was causing the troubles I ran into.
Given (after some more testing:)
- Map Western Front Summer
- Not too big a mission, but lots of action still.
- Issue with garbled screen occures after using Shift-F2/Ctrl-F2, so switching views/camera's (when one's killed early in the mission, one tends to use those views quite a lot, also when one is testing a mission one just built.)
- Errors in Log.lst: GL error 0x0505 (which could mean -according to some googling- OUT OF MEMORY.)
- Errors in Log.lst: WARNING: Camera: unexpected 'ActivateWCM'
Using some google, I ended up on the ultrapack forums, where someone was getting these errors. And he fixed it by using 'a different conf.ini'.
Well, my conf.ini (as the complete UP30) is just a very recent copy of 4.10.1m which runs quite nicely.
Opened it up... and thought a bit.... calculated 1+1.... decided it could be three here -me jumping to conclusions- and attempted to set LandGeom=3 back to LandGeom=2 ... and voîla, no more graphics garbling up here...
Mission now runs fine, I can follow all views untill the C47's and the 190's have landed at their home base...
Then doublechecked it, by setting LandGeom=3 again, and for sure, some 15 minutes into the mission Mayhem joins in again...
So, here's a question for the ones that tested this Tempest IIFB based mission with me: What's your Landgeom= set at?
(it's in the [render_OpenGL ]section of conf.ini)