I’ve been testing raytracing on landscape. RTX2060, 32gb ram, ue4.25.1, I made a 8129x8129 landscape(super simple material) in TPS template map, plus sun & skylight, nothing else. Then “stat unit”.
Without raytracing, it runs 8~9ms which is no problem, with raytracing(project default settings, no fancy parameters) I got 20~25ms when looking around(rotate camera). I guess that value is quite normal considering my little video card and huge landscape, but when I press WASD to move, GPU time quickly went up to 70ms. No matter how I tune parameters, for example I turn off RT shadow/AO/GI, only reflection left, and use low maxRoughness or almost zero RayDistance, still got much worse performance when camera moved.
I heard about epic or someone in forum successfully converted kitedemo to raytracing version. So I wonder what r your landscape projects performance with raytracing? Or somebody enlighten me why performance dropped so bad when camera move, is it because huge landscape generate enormous BVH so it’s not game ready yet, or I missed some key tweaking?