I recommend everyone to take a look at this, to see how a good post-processor can improve the look of Combat Mission (and many other games):
The link to ReShade: https://reshade.me/
Google 'reshade', there are many guides and tutorials available.
I said I'd make an illustrated guide, and I did! Hopefully it helps some of those who were asking me about it
Step Zero is to download the Reshade distribution at the bottom of the page here: https://reshade.me/
Steps 1 through 8 are in my guide here: https://drive.google.com/open?id=1LG9Og33Re95sPx4KyKtk98DjyUyK-Qcn
And my preset is here https://drive.google.com/open?id=1dQ5zgLkyS5RRI559yJG929QFs2YqnRdb
Hopefully the archive works, I didn't really do extensive testing on