Trying to make LIGHTNING: Directional Light intensity cuts to 0 but scene exposure still fades out slowly

Development Rendering
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1

Here is footage of the issue: https://www.youtube.com/watch?v=Ayb3eR1e4YQ

I’m trying to create a lightning flash effect using a Directional Light controlled by a Blueprint Timeline. The light intensity spikes and drops correctly, but even when intensity hits 0 instantly, there’s a visible fade-out that I believe is caused by auto-exposure adaptation. I’ve added a Post Process Volume and tried locking exposure via Manual metering mode, but no luck. I’ve also tried disabling auto exposure. Thanks for the help.

2

Try also turning Lumen off :slight_smile:

3

hi ,

Maybe these links to the original manuals

Download the ‘Lighting in Unreal Engine 5 for Educators and Students’ guide

or try

Lighting and Lumen Quick Start Guide in Unreal Editor for Fortnite | Fortnite Documentation | Epic Developer Community