For those still playing around with early raytracing stuff in dev-rendering, RTGI has been checked-in! Yay! :
Ray tracing global illumination. Currently disabled by default to evaluate performance and quality in WoodChuck.
r.RayTracing.GlobalIllumination (enables RTGI, default = 0)
r.RayTracing.GlobalIllumination.Denoiser (enables denoising, default = 1)
r.RayTracing.GlobalIllumination.SamplesPerPixel (determines samples-per-pixel, default = 1)
r.RayTracing.GlobalIllumination.MaxBounces (determines maximum number of diffuse bounces, default = 1)
r.RayTracing.GlobalIllumination.EvalSkyLight (determines whether or not SkyLight can be hit with indirect diffuse, default = 0)
r.RayTracing.GlobalIllumination.MaxRayDistance (maximum ray distance for diffuse and visibility rays, default = 1.0e27)
Details: https://github.com/EpicGames/UnrealE…8819913010a6c0