Unreal Engine 5 - Optimizing Lumen, Lumen Reflections and Troubleshooting Virtual Shadow Maps скачать в хорошем качестве

Unreal Engine 5 - Optimizing Lumen, Lumen Reflections and Troubleshooting Virtual Shadow Maps

HI! Here I want to share with you what I found out the last several days testing UE5. I came across exciting optimizations (at least to me) and advanced settings for lumen, lumen reflections and virtual shadow maps, which help troubleshooting issues or weaknesses I experienced so far, and can even improve the overall quality of these features. I apologize for my poor english skills (and also deeply for the clipping sometimes, it really hurts my soul, but I just wanted to put this out so it is available as soon as possible). I hope you are still able to understand everything I want to share and at least find it helpful for your needs of experimentation. If anything might not be clear to you, I will gladly try to answer your questions in the comments, as far as I know/understand this stuff myself. Please note again: I am NOT a professional tutor or Unreal Developer! I do not even make tutorials in general. Everything I explain in this video is based on experimentation, combined with assumptions made of only some background knowledge about the whole lighting topic. Added console commands to one user's suggestion: Virtual Shadow Maps: r.Shadow.Virtual.ContactShadowLength - controls precision of contactShadows to the casting object. Set it to 0.01 for example, or lower. r.Shadow.Virtual.ResolutionLodBias - controls smoothing of virtualShadows based on distance. Be careful to select the right option according to your light-type. 0 or negative values for wider smoothing range. r.Shadow.Virtual.NormalBias - use this to fix virtual shadow artifacts which appear when the casting shadow is to close to casting object's surface. Set it to 1 or even higher values like 1.5. Default should be 0.5. Lumen Reflections: r.Lumen.Reflections.HierachicalScreenTraces.MaxIterations - reduce this to low values to get rid of unrealistic dark areas (shadows?) in lumen reflections. Set it to 4 for example. r.Lumen.DiffuseIndirect.MaxMeshSDFTraceDistance - seems to control the distance to which distance field meshes are taken into account, affecting basically the mesh clarity/resolution range in lumen reflections. Lumen Global Illumination: r.Lumen.DiffuseIndirect.MinTraceDistance - increase this if you find nearby areas from light reflecting surfaces to be to dark (very subtle). r.Lumen.ScreenProbeGather.MaxRayIntensity - values between 0 and 1. Controls the overall amount of indirect lighting intensity in the whole scene. r.Lumen.ScreenProbeGather.FullResolutionJitterWidth - higher values mean less jittering (it gets wider) but more visible noise from the indirect lighting. 1 should be default. r.Lumen.ScreenProbeGather.DownsampleFactor - lower values mean more probes are used to collect light for the scene, which increases overall lighting precision/quality and reduces noise, but for a high cost in performance, default is 16 and should only be changed if absolutely necessary. r.Lumen.ScreenProbeGather.SpatialFilterMaxRadianceHitAngle - gives some control over ambient occlusion (in my opinion, but I don't really know, what it does). Higher values for sharper and (I find more precise looking) ambient occlusion. I suggest to think in degrees from 0 to 90. r.Lumen.ScreenProbeGather.SpatialFilterNumPasses - how good the jittering is filtered, higher values give smoother lighting results.