LUMEN in Unreal Engine 5 | How it REALLY works ?

[@allthersr3532]

Awesome explanation. Thanks

[@ProjProd]

With pleasure !! Thank you very much for your comment

[@RajDey-td9go]

Nice explanation with proper steps ❤.

[@ProjProd]

Thank you so much for your comment and your support bro ! 🫶🏼

[@allthersr3532]

Hey @ProjProd. I would love to hear more detail a couple of things -how to avoid meshes popping -how to avoid noise in the lighting. Cheers.

[@ProjProd]

Hey! You can increase Lumen detail quality through your Post Process Volume in order to avoid culling in your lighting. But this will heavily impact performance. If you have noise, make sure via the various view mode that everything is in order. If you have any mesh without cards for example or displaying only culling visibility in Surface Cache mode, it might occur artefact. Even their cast shadow will create noise or shadow popping !

[@Foxcoder]

thank you , well explained, and glad I found the channel, you got so much helpful content for Unreal, I will check back regularly, great work.

[@ProjProd]

Thanks a lot @Foxcoder ! Happy to be helpful 🙏

[@afssai]

Hey! Have a question. I had imported a chair in my scene and after I checked the cards it was not showing so I tried to play with lumen scene detail and didn’t work and then I break the chair into parts and sitting area worked when I turned off the capture mesh distance field in the mesh editor panel. But the legs didn’t work. I noticed for some small other objects also same issue happened. With doing all the fixes still they don’t show the cards. How should I fix this issue?

[@ProjProd]

Hey man 👋 Try to double check if you scaled your mesh within the editor. Sometimes, messing with the scale could impact Lumen perf. If so, you can bake and "freeze transform" via the Modeling Tools, both scale and rotation (under "Xform" and "Bake Transform"). Otherwise, you may have to check the material you are using for the model ! Hope it helps 🙌

[@RichardRiegel]

Excellent explanation

[@ProjProd]

Thanks a lot !! I'm glad it shed some light on the subject. 🤩

[@ibbles]

Very interesting. Do you have a video explaining the bit at 7:35 to 8:02 about fixes for light popping due to mesh culling in a bit more depth and detail?

[@ProjProd]

Thanks man ! 🙌 I don’t have a video specifically for that but the solutions I mentioned can cover it quite enough. Although, you can use another fix which is to activate the « use emissive » setting in the details panels of your placed actor in the editor. It happened to fix some of resistant culling meshes, mainly with some Bridge’s meshes. Hope it will help you ! 🙌

[@JasonKey3D]

thanks!

[@ProjProd]

Thanks for watching bro ❤

[@totorobert1848]

merci beaucoup

[@Dev_Roids]

👍👍

[@lucutes2936]

just a heads-up, you're too far from mic which makes this video very quiet