# How to stop strobing (bug?) when facing sun

**URL:** <https://forums.unrealengine.com/t/how-to-stop-strobing-bug-when-facing-sun/480977>\
**Category:** Platform & Builds\
**Tags:** Atmospheric-Fog, unreal-engine, question\
**Created:** [March 27, 2021, 9:49pm UTC](https://forums.unrealengine.com/t/how-to-stop-strobing-bug-when-facing-sun/480977 "2021-03-27T21:49:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aahbats](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@aahbats](https://forums.unrealengine.com/u/aahbats)\
**Post date:** [March 27, 2021, 9:49pm UTC](https://forums.unrealengine.com/t/how-to-stop-strobing-bug-when-facing-sun/480977/1 "2021-03-27T21:49:38Z")

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(Possibly bug: UE-43545)  
Very simple scene with a floor, a direct light source and atmospheric fog. When I select my directional light and toggle on “atmosphere sun light,” this causes a strobe like effect whenever the sun is visible in my viewport. The view rapidly goes between normal and black, making it very difficult to work with and possibly seizure inducing.

I am new so if there is a known way to fix this please let me know! I am following the recommended starter video “Your First Hour with Unreal Engine” step by step and I have encountered this bug (this strobing does not occur in the video). Can be reproduced by following from about the 5 min mark in the “building your first level” lesson.