Added too many lights and now i cant open my project please help

Development Rendering
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1

Hi

Please help me. Is there anything i can do to be able to open my project and reduce the lights. I added too many lights. I made sure to save in unlit mode. When i tried lit mode, it crashed. and now everytime i open the project it instantly crashes. how can i open it and remove my lights. please im almost done with my project i spent 1 month on this please help me. UE version is 5.1 preview 1

here’s the crash report
LoginId:94ed931d4f464430c4bf5ab44eed19c5
EpicAccountId:7b6f75e8e1644f45b267784967bcb62d

Assertion failed: CullingContext.DrawPassIndex == 0 || CullingContext.Configuration.bSupportsMultiplePasses [File:D:\build++UE5\Sync\Engine\Source\Runtime\Renderer\Private\Nanite\NaniteCullRaster.cpp] [Line: 2913]

UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

2

After a lot of cussing and frustration I finally streamed the level on a new level (in a camera view where to lights arent seen, unlit mode) and edited everything then i can now open it.

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3

If I may ask, how many lights and how did you end up with so many lights?

4

oh like 50 in one wall and another 30 or so in the ceiling. Because it was a cove light and i have no way to make it other than put lights one by one. wall and ceiling are both curved.

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image1920×924 308 KB

emissive dont work well either. i hope they wwould make something like in vray. light to mesh.
ceiling:
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wall
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image1920×655 192 KB

i just duplicated the level multiple times and make sequencer separately so it wont be all lights in one file.

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5

I thought the limit was something above 200 lights for lumen. And pathtracer shouldn’t have that limit at all AFAIK.

I don’t think this should be crashing. And not being able to open the level afterwards sounds scary.

Edit: in your first post there is a reference to some nanite file. Could be nanite related rather than many lights. Or a combination of the two.

6

It did have some other lights scattered over the whole level probably around 50 or so.

yeah it was so frustrating especially since I was like 95% done at that point and all that was left to do was add lights and do the sequencer. I wanted to cry and smash things at that point. Then I recall this tutorial I watched before about streaming levels that are too detailed so it will only be called when your camera is near so i tried that and luckily i can edit the level there as well while streamed. i just had to be careful to not have it in lit mode and not look at the lights lmao.

I even tried opening the .umap file in note pad and search for the point lights and maybe i could delete them. turns out you cant do that - unreal gets stuck in loading when you edit the umap. or even open it and not edit and save. it will never open again. good thing i cloned the project first before doing that cos that wouldve been it.

I also found out. that if you open a different level and set it to unlit. then open another level that was savd on lit. it will open in unlit mode!

yeah i didn’t understand that as well it kept saying nanite in the crash reporter.

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