UE4 onwards has this interesting mechanism where it slows movement as you move through a zone that triggers asset loading. It removes loading screens by imposin

UE4 onwards has this interesting mechanism where it slows movement as you move through a zone that triggers asset loading. It removes loading screens by imposing a movement speed penalty to give it time to pre-load assets. The pitfall is that if you're short on VRAM you can feel like you're moving through treacle near doors you don't even intend to open! All at 60fps...