Unreal Engine culling is great, but when it comes to dynamic lights, there is still a lot of improvements that can be made.

This tool allows you to get a massive performance boost without any quality loss!

Youtube Demo Here

The portal system toggles lights visibility to true only when you can see them, tremendously improving the performance. The performance gain will depend on your level layout and number of dynamic lights.

All you need to do is setup portals and zones. I am explaining it in detail in this video tutorial

All the lights, and this include point lights, spot lights and all the lights attached in blueprints inside a zone will be set to visible when:

1) You are inside the zone

2) The zone is visible through a portal

The portal visibility check is based on Unreal Engine built in HZB occlusion, so it's extremely fast and efficient performance wise.

To give you an idea, we have tested in levels from 4000 to 25 000 actors, with 50 to 500+ dynamic lights, more than half of them casting shadows. Volumetric lighting enabled.

We're getting 30 to 60% performance improvement with this system, making them playable on a low end gaming computers (8 years old i7 950 processor and GTX 950 graphic card).

All that in Epic settings for everything except shadow (high)

/!\ UE 5 info /!\

due to the nature of Lumen, and lights affecting more than their default area, setting up the system may be harder in some cases

For support or any questions, please contact us at [email protected].

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