I have been experiencing an issue where performance drops significantly if I am looking at an actor, close up, with LODs and dithered LOD transition option turned on (in the material). The closer I am to the actor, the more significant performance drop is.
I don’t believe performance drop happens during one LOD transitioning into another, but when base LOD is being rendered and camera is really close to it.
If I turn off that option in the material, I have no performance drop at all.
foliage.DitheredLOD 0 cvar does the trick and disables dithering between LODs on HISMCs and foliage (although I only tested with HISMCs and haven’t tested performance on the device yet)
I also was not able to revert back to dithered LOD transitions (any value of the cvar does something except bringing back default behavior)