I'll check also that, but I'm quite sure the game is in OpenGL mode.
The water on your screenshot is DirectX mode, flat, no weather dependant waves or reflections.
A few days ago someone asked for suggestions on how to set up their conf.ini with some good settings
here -
https://www.sas1946.com/main/index.php/topic,52875.msg575468.html#newI have posted my personal game settings as was also recommended to me by VPmedia many years ago and
it works really good for the VP-Modpack , and also on my old game version DBW-4.10 (with DBW-1916).
You could give this a try and see if it works for you. Just a suggestion.
As for setting up your graphics card, that is important too, but a totally different thing because
everyone has different graphics programs. Just set that up so you will see no jagged edges on
the airplanes wings and you are able to see thin and smooth antenna wires on aircraft like
the Me-109 or Fw-190 or on some biplanes. Once you see perfect looking wires and no jagged edges,
then your game is really perfect for a visual experience using the Il2-1946+Mods.
Good luck and happy flying!