Fix Menu Lag

Starting pretty early on, some players have noticed that both the pause menu and their map would lag. The kicker is it only seemed to really happen when they move the mouse cursor. Weird!

I've had this problem ever since upgrading from my RX 580 to an RTX 2070 Super. I pretty much noticed it immediately and went years without finding a fix.

Until now.

There's a very simple fix for this issue.

Switch from Vulkan to OpenGL in the game's settings.

DOOM uses a much older Vulkan API version that doesn't play well with modern versions of Vulkan, which usually come packaged with GPU drivers. Because of this, Vulkan actually tends to hinder performance and cause performance spikes seemingly at random, unless you're running on hardware that does not support a higher OpenGL version or using drivers circa 2016.

Kthxbye.