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* When r.Lumen.ScreenProbeGather.DirectLighting is enabled, all local lights will be rendered by Lumen (if enabled) * With 8 shadowed lights on screen, Lumen Direct Lighting costs .4ms, while Cached Shadowmaps cost (1.3ms), Distance Field Shadows are (1.8ms) and Virtual Shadow Maps (6.1ms) on a 2080 TI at 1080p resolution * IES profiles and Light Functions are not yet supported, nor is Hardware Ray Tracing * Shadowing and light attenuation resolution is tied to Screen Probe Gather downsampling so quality becomes poor with High GI settings (32x downsampling) * r.Lumen.ScreenProbeGather.LightSampleResolutionXY controls how many light samples are traced per Screen Probe, with lights being selected with equal probability. More lights overlapping causes more noise, not increased GPU cost. #ROBOMERGE-OWNER: daniel.wright #ROBOMERGE-AUTHOR: daniel.wright #ROBOMERGE-SOURCE: CL 21213896 via CL 21214406 via CL 21214468 #ROBOMERGE-BOT: UE5 (Release-Engine-Staging -> Main) (v972-20964824) [CL 21214926 by daniel wright in ue5-main branch]