Yeah, just done the reverting to 1.5.6. I found the same solution proposal in the issues thread you posted before and came back to share this temporary solution with others, it's good to see that you care for us and were faster :>
AND it WORKS like a charm, issues gone, renders everything smooth. I'm sorry about the ghostland Chinooks and trucks remarks, they were totally innocent in the end - and they look great in 60fps! :>
For my followers: I had a prompt saying "this mission requires activation". I activated it for the first time on 1.5.7 (now I'm 1.5.6).
SOLUTION TO ABOVE: delete SweetFX (and expiecially the dxgi.dll from /bin) Source
About the development of the DCS - I totally agree and welcome updates. You know how it goes with the sentymentalism of older games - I had memoires of LockOn being the same like now DCS and tried it - nope, it's not, a lot has changed :>
Thanks again for help and for campaign!
Take care! (-ω-ゞ, K.
UPDATE: Finished the mission on first try and got the Medal of Honor :> Since when do pilots get MoH for excercises lol Thanks again for help!