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Mixed SSS Closures render too dark in path tracing
Confirmed, NormalPublicBUG

Description

Blender Version
Broken: 2.83.10, 2.91.2, master @ 927d099ec099e176b6e1f65555cbd4e70f681301

Short description of error
When a shader combines two SSS closures with a Mix Closure node, path tracing renders the result as too dark. Branched path tracing gives the expected result.

Exact steps for others to reproduce the error
Open attached file.
Render it twice, once with "path tracing" selected and once with "branched path tracing".



Event Timeline

Stefan Werner (swerner) changed the task status from Needs Triage to Confirmed.Jan 22 2021, 11:55 AM
Stefan Werner (swerner) claimed this task.
Stefan Werner (swerner) created this task.
Stefan Werner (swerner) added a subscriber: Cycles.
Brecht Van Lommel (brecht) changed the subtype of this task from "Report" to "Bug".Jan 26 2021, 4:36 PM