[Meneldil]

I'm temporarily on another PC with a lot better CPU than the one i usually use, but with onboard GPU (intel 4600), so all in all, even the retail campaign doesn't run smoothly with the default launchers "all features on, high settings", and with both launcher flags and ingame sliders i've no idea where do i start lowering/turning off stuff, so i'm looking for tips like "try turning off shadows first", or bp's "try lowering lightning settings".
 
Sorry i'm opening a topic for something that must've been already discussed, but i don't remember seeing it.

[Phantom Hoover]

If you're on an Intel chipset then -no_glsl should be your first port of call. Add it to the custom command-line options if you can't find the setting for it in the launcher.