Fast Way To Bake Lights in Unreal Engine 5

[@danualscarbrough643]

"and here it says restart" Me: *Clicks Restarts* "But before you do that..." 😂

[@metedev]

Haha I’m sorry dude, make sure to watch couple seconds more after I said something:))

[@CompositingAcademy]

will this look the same in VR? I’m new to baking light in Unreal, some older tutorials showed some kind of visual difference brightness wise. I’m trying to figure out if it’s a smart workflow to bake directly into the diffuse color for small VR scenes out of blender, or to use the unreal baking like you’re doing here

[@metedev]

I’m not into VR stuff so I’m not sure, you can find out only with trying imo.

[@DeltaNovum]

Baked lighting is still very much a good way to go with VR. Halflife Alyx uses baked lighting for their environments for the most part for example. As long as you won't use many dynamic lights, want to use the specific rendering techniques for deferred rendering (like nanite), or have a world too large to bake, you could choose to use forward rendering. Which has a couple of pros when it comes to VR. The way you bake is up to you as the artist.

[@CompositingAcademy]

@@DeltaNovum useful to know, thank you!

[@melomaniakjm]

But GPU light mass bake isn’t as accurate as CPU baking. I am using 5.4.4 and i get better bakes with CPU light baking.

[@metedev]

Yes, it’s still in beta. Sometimes old way is the best way.

[@robertYoutub]

Small tipp: don’t rotate the view all the time.. its hard to watch

[@metedev]

I got that criticism a lot:) I’m being more careful in new ones ✌🏼

[@thenoobdev]

keep rotating the view; it keeps me focused

[@marcesmack]

Can I use this baked lights to export them as USD files?

[@thenoobdev]

Is it, and how, possible to bake both a day and night scene lights and switch them on runtime ? So i can have the same level, but with baked lights in night and day

[@metedev]

It can be done with changing light maps in code with timer but you need also smooth transition between them, I think it’s harder to do.

[@thenoobdev]

@@metedev Thanks for the response; i wasn't really clear in my initial post.. So my goal should be fairly easy.. The user can select before going into the mission: night or day, thus we don't need transition from day to night; it's OR night OR day.. Hope this makes more sense

[@korean_cuisine233]

small question. how do I bake multiple levels at once? I have 150 maps, and it's time-consuming to bake one level at once.😢

[@metedev]

Holy, what you gonna do with 150 maps? :)

[@fangzhang9209]

how do i export the lightmaps baked by the lightmass? Thanks!

[@metedev]

Unfortunetly (as much as I know) Unreal keeping maps with a different format, so there is no way to export them.

[@ghazinspace]

any solution ?

[@ATomCzech]

On the beginnng you told that lightmass is completly different than lightmap, that is is not using writing lighting data directly to the object textures and it allows to somehow moving with object, but then when you started talking about fixing issues you immediately talking about light map resolution, so it is used or not? You even sometimes showing something in GPU ligtmass windows and telling "CPU" instead of GPU. So confusing. I think that setup is too complicated now. There is no easy switch between Lumen and baking lights. I would like world when I can do whole game with Lumen and then decide that I want to make game running also on less performance GPU and simply bake lights for low performance GPU and use Lumen on high performance one. It means that highend PC will have fully dynamic lighting change from day to nigh and lowend PC will have for example just 3 baked steps. But is impossible to do this. because you need completely different light setup when you switch to Lumen or Baked lights 😞

[@metedev]

I believe using 2 different setups in the same game (Lumen GI and baked) is make sense if you making for PC/Consoles. GPU Lightmass is good for performance for sure, but (I suppose) not good as much as standart baking. Even standart baking takes more time, it might be better if you targeting low-end or old PC specs. By the way, every time I've talked about GPU Lightmass, it will be GPU, I've said CPU without notice :)

[@artiomarenkov99]

Thanks😊

[@metedev]

You’re welcome:)

[@yuechuanxi195]

Amazing information in this video Thank you. but I am also getteing motion sickness by watching it:(

[@metedev]

Sorry dude, I’m moving the cursor less in new videos:)

[@John_atCTS]

STOP MOVING THE CAMERA AROUND SO MUCH!!! You're inducing motion sickness in all your viewers!

[@metedev]

Noted, I will be more careful 👍

[@John_atCTS]

@@metedev- don't get me wrong. The content was informative and very helpful and thank you for posting it. It's just unwatchable IMHO.

[@heisenberg3206]

VR might be your biggest phobia

[@evvveeeeeeee]

This has been a feature since UE4

[@metedev]

That's right. *newer than CPU-based baking*

[@evvveeeeeeee]

@@metedev the problem is not "newer," it's that you claim it is "a new method". UE is currently at 5.3 and some odd change, but this feature has been available since, at least, 4.26.

[@metedev]

I've changed to 'fast' but stil, most of people doesn't know that, and it is still experimental feature. Title was about newer than standart CPU baking. @@evvveeeeeeee

[@mehck2]

@@evvveeeeeeee maybe it was new to him XD

[@simonriou1328]

yeah nah, don't do that, it's just gonna take 15 more mins to launch your project compiling shaders on your cpu at 100% so that they don't have to be compiled on it later. you're only gonna waste time and cpu lifetime...

[@metedev]

I believe GPU-baking is a good tool than CPU-based baking. At least you can adjust real-time, also less time to bake it. Maybe some devs consider for optimizing purposes.

[@hicarodestrui]

This is good for optimisation. We have a lot of games that does not require real time lumen, and this can greatly improve performance without hurt the graphics. Which us something that PCs and Console Players really want.

[@ghazinspace]

u move mouse too much that makes sick