Developer Notes

This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.

Description

Seems to be an issue with the indirect lighting cache where if you have interpenetrating static meshes (for example static mesh rocks that make up the ground), there are cases where the cache points along the boundary where the static meshes interpenetrate are spawned inside one of the static meshes, and as a result the sample at that point is very dark

[Image Removed]
Volume Light Sample Placement Scale is 0.2 here
(The project in question seems to have this set low as well to get many samples)
Seems more likely to happen with a higher number of samples?

If the character walks into this area, their lighting suddenly becomes very dark
Was able to repro this in 4.8

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There's no existing public thread on this issue, so head over toAnswerHub just mention UE-16837 in the post.

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Won't Fix
ComponentRendering
Affects Versions4.8
CreatedJun 10, 2015
ResolvedFeb 14, 2017
UpdatedApr 27, 2018