Quixel Megascans assets performance in games

Lemenus

Are they intended to be injected straight into game, or they need retopology? Yes, they are already optimized, some of them optimized very well. I just still new about 3D so I'm not sure about having models in games with bevels, chamfers and any relief on their geometry

Obscura

You can always run auto-reduction inside unreal if you run into performance issues coming from heavy assets.