The setup for HDRIBackdrop leads to double-counting of the illumination between the skydome and the geometry in the path tracer.
Reported through UDN:
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-136318 in the post.
|Component||UE - Graphics Features - Path Tracer|
|Affects Versions||4.27.1, 5.1|
|Created||Nov 30, 2021|
|Resolved||Apr 18, 2023|
|Updated||Apr 19, 2023|