It is an building with furniture
Unreal Engine 5.2
We used the collabviewer template
Building has windows, there is no lightning in the building.
![](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/image.png)
This is how it looks with lumen turned on
![Interior with lumen turned on](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/withlumen-1024x584.jpg)
For performance in VR I want to turn lumen off Settings:
![](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/settings.jpg)
Result for chairs in the building. Strange “shadows” appear. Even when I turn shadows off for the chairs. Nanite on or off for the chairs does not change anything.
![](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/nolumen-1024x577.jpg)
If I put the chair outside the building. No problem
![](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/outside_nolumen-799x1024.jpg)
If I put a light inside the building, it looks better
![](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/withspotlight_nolumen-1024x725.jpg)
If I turn cast shadows off in sky_light
Settings:
![](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/image-3.png)
Result. FPS goes up! Ofcourse it is not like with lumen on.
![](https://unreal.fluiddynamics.eu/wp-content/uploads/2023/06/image-1-1024x609.png)