Do we know what r.Lumen.DiffuseIndirect.MinTraceDistance does exactly?
I’m having an issue with skylight leak fading at distance and it seams that r.Lumen.DiffuseIndirect.MinTraceDistance fixes that. Default Value is 10 but if you increase that the issue seams to be gone.
Funny that in the Unreal documentation there’s no data about this cvar, but it’s listed here https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-console-variables-reference
ChatGPT says this but doesn’t points to a specific source:
In Unreal Engine 5.4, the default value for the console variable
r.Lumen.DiffuseIndirect.MinTraceDistanceis 10.0 units. This setting determines the minimum distance at which Lumen’s diffuse indirect lighting traces begin from a surface. Adjusting this value can influence the accuracy and performance of Lumen’s global illumination calculations.
For the most accurate and up-to-date information, you can refer to the official Unreal Engine documentation or use the console commandr.Lumen.DiffuseIndirect.MinTraceDistancewithin the engine to query its current value.