Doom The Dark Ages - optiscaler/OptiScaler GitHub Wiki

DLSS inputs are not unlockable on AMD/Intel, spoofing doesn’t work due to extra checks, Nukem also won’t work on AMD consequently

RTSS overlay conflicts with Optiscaler - when RTSS active, Opti overlay is invisible, when you hide RTSS, Opti overlay works fine

While FSR FG is turned ON, RTSS overlay causes crashes - workaround

While FSR FG is turned ON, invoking Opti Overlay causes crashes - workaround is to disable FG first

Using Optiscaler as winmm.dll works

FSR 3.1 FG sadly isn’t decoupled, but you can replace FSR with XeSS and still use FSR FG (should work with DLSS also)

To update the FSR DLL, replace the one in amd-ffx folder