Loading scene additively causes change in lighting

I load a scene additively and have my main camera in the first "core" scene and the game world plus single parallel light in the second scene (I've also tried retaining the light in the first scene). The game world now appears to be rendered at 50% brightness.

I've read elsewhere on the forums that this could be a problem with global illumination not being re-computed. But I can't see any way to fix this in the Lighting window. Has anyone encountered this?

 

Screenshots of the problem shown. The brighter scene is how it looks when I load the scene by itself and throw in a camera. The darker scene is using additive loading with the main camera in the other, top-level scene.

 

Ok, so when I had opened the Lighting window, the game was running. D'oh! Here is what I did to fix it (but I hope someone can clarify what is going on):

1. Open the scene that is being loaded, containing the game world.
2. Window -> Lighting -> Settings
3. At the very bottom, uncheck "Auto Generate" and then click "Generate Lighting".
4. Save the scene (leaving "Auto Generate" unchecked).

"Auto Generate" is supposed to respond to any lighting changes in the scene. I guess this is a bug? Also, when I re-enable Auto Generate, it breaks again. Shouldn't it have saved the information from the last manual run? Is there some sort of internal cached light map that doesn't get flushed out?

 

Thanks for the reply. I've since encountered this problem again but now it's even more difficult to solve. My top-level scene contains a directional light. I load an empty scene (no camera, no lights, nothing at all) additively. The reason I do this is so that game objects all get created in this scene allowing me to blow it away when I want to return to the main menu.

There are no lightmaps to generate here. All in-game objects are generated dynamically (this is a HoloLens app). Yet the lighting is screwed up for all objects in this new, initially-empty scene.

Any ideas on what I can try?

EDIT: If I remove the directional light from the main, top-level scene and add it to the loaded scene (so that now, this scene contains one game object initially -- the light -- before the others are created), it looks fine in the Unity Editor when playing.

I can probably live with this for now but it's not ideal. My top-level scene will have a 3D menu that will need to be illuminated. I could turn that into its own scene but it's not really necessary and I would prefer that the light object resides there.

I would also be very curious to better understand what's going on.

 

Im still seeing this.. did this never get looked at?

 

OK, there is some special sauce to it, cos I made a weeny project to show you and it didnt do it, but on my actual game, it does.. its now 1.40am.. maybe not work on this more tonight, try again tomorrow

its now 2.20am, and im uploading..

I think part of the issue is if you make a scene to hold UI, you load it additive but its possibly because the lighting on that scene effects the current, but it doesnt reset when you unload either.

Pls note i even changed the lighting on the UI scene to black black black, and.. it does the same so this does totally reproduce the issue.. as both scenes had black black black but adding the UI made the whole thing lighter forever

Case
1137412

 

No, its not XR, it is a generic issue in unity all over

 

I'm having the same problem as @trzy and I am making sure to change the newly added scene to be the active scene as you've described. I did however find that @trzy's original solution does work for me, though it is a bit cumbersome..

 

Note to everyone else who gets here via Google: at least in Unity 2019.1.11f1, it's important to yield a frame between loading an additive scene before setting it active, otherwise it won't work (ambient lighting won't switch over)

Code (CSharp):

1. SceneManager.LoadScene( "myScene", LoadSceneMode.Additive );
2. yield return 0; // wait a frame, so it can finish loading
3. SceneManager.SetActiveScene( SceneManager.GetSceneByName( "myScene" ) );

 

I experience the same issue in 2018.3.4f1. I load a scene additively and its lighting is not activated. I tried your suggestion and it *appears* to fix the problem! Thank you!

 

I solved mine by changing my main scene's light to "Baked" mode. Simply click on the Directional Light > Light > Mode, and switch it to "Baked", rather than "Mixed".

Next step is to go to Window > Rendering > Lighting Setting, then unchecked the "Auto Generate" and click "Generate Lighting".

 

Switching the active scene is not a solution for us. In a multiplayer game, the server and client have a common main "container" scene, and both additively load subscenes for the various levels. Each level has different skybox, lighting, etc. The container scene has no lights, no skybox, just a main camera set as shown below.

 

Did you ever find a solution to this?


Edit: -----

Note to anyone having this issue: In addition to the main scene needing a lightmap baked, all lightmaps also need to be baked as directional or non-directional. It will not properly load a directional lightmap if your active scene uses non-directional lightmaps

 

That did the trick for me. Thanks!

 

did you ever find a fix for this? I am so close to locking down my first playable demo, and this issue has stopped me in my tracks....3 months of work, and now I am stuck.

 

I am using HDRP, and this doesn't appear to work, the tutorial on the asset store is also broken. (Ideally I wouldn't switch active scene, but even doing that via the editor, or code doesn't work). Additive scene loading is how Unreal is used, so I just jumped into unity thinking I could use the same approach.

 

SceneManager.SetActiveScene( SceneManager.GetSceneByName( "myScene" ) );

You can solve the problem in the URP, thank you

 

I'm a newbie and none of the advice helped me. However when I went to Window > Rendering > Lightning > scene tab; If "lightning setting" says “none”, click on it and choose “demo”- setting. Press “generate”.
So it seems like it was missing settings all together which made the scene go dark when loaded. Hope this helps.

 

really frustrating, adding a sample scene with a Cube add a script call SceneManager.LoadScene(0); issue appears. Using unity 2020.3.4 LTS (URP template)
I have only one scene on restart issue appears none of the solutions above mentioned worked for me

SceneManager.SetActiveScene( SceneManager.GetSceneByName( "myScene" ) ); - setting this didnt reset the scene

 

In unity 2020, if you are facing this issue then click on Generate Lightning. It should work.

 

This means that i need to use the baked lighting, and this happens only with in editor not in the application built out of it.

 

i love your profile pic xD

 

This Helped Thanks

 

Your asset has been deprecated, and I can not access it. Could you provide it again, please?
Or is it outdated? Thank you very much!

 

Lots of hours trying to resolve some strange lighting...only to find this line was missing from my code!

Some phrases for search engines....

Black Shadows not reacting to lighting settings.
Real time shadows not acting as expected.
Crest Ocean shadows on water not working.
Skybox shadows too dark.

 

This bug persists in 2020.3.7f1. I hope, they fixed it in the recent versions.

 

☝️ This bug persists 2020.3.21f1

 

This helped me a lot tysm

 

Setting the active scene worked for me (fixed lighting and got the fog showing again).

I am loading scenes additively to work around a nasty bug in Entities 0.50 with prefabs and companion objects.

 

I had a similar problem, but the Rendering/Lighting Window is very deceptive about which Scene you're changing the settings on. I had a Main Start Up Scene that I was accidentally setting all the light options for. When I changed the active scene to a level scene, I lost my Skybox. If you're going to change Lighting Settings, make sure all other scenes are unloaded.

Ideally, the Rendering/Lighting Window would have a dropdown displaying the Scene you're changing the properties for.

 

Running into this in 2021.3.2f1, but only in a build. All of my scenes have the exact same environmental lighting, no skyboxes, and only one scene has a directional light- which is realtime. I'm setting that scene as the active scene. Have generated lighting in all scenes.

Can't reproduce it in the editor, so it's making it quite difficult to figure out.

The problem seems to be, for whatever reason, the build is changing the environment lighting value. I wrote a quick script which just sets RenderSettings.ambientLight to the correct value in Update, but even that doesn't seem to effect anything in the build- works perfectly fine in the editor. All the scenes I am loading have the exact same lighting values/colours etc.

 

Hitting this issue as well, 2021.3.5f1

The listed solutions don't appear to be working. Default camera skybox, default directional lighting.

I modified things so there's only a single directional light in the second scene, with no light in the starting scene, but there's no change. I still see the same behavior shown in the OP's screenshots.

Further edit: it appears to happen in the editor only, if I build and run it, I don't see the issue.
Is definitely skybox related. Modifying lighting->environment to use 'color' instead of skybox for the source means there's no longer a change in lighting on loads.

 

Gonna take it as this was not fixed? i read everything that was said to fix this issue, done everything
my only solution is to delete both cam and light from my 2 scenes and replace them, i cant do that while playing the build product if this is still happening its clearly a bug that needs fixing please

 

Hey there

I had a similar problem;

I have 2 scenes in my project (main menu and the actual game).
Whenever I loaded the game-scene from the main menu the lighting was getting an orange touch. I played arround with the lighting settings a bit, but nothing helped so I ended up setting them back to default.

I have 2 directional lights set up (one in each scene), I noticed that the one on the main menu had a different rotation from the one in the game-scene.

I changed the rotation on each light back to the default rotation, which did the trick for me.
(In my game there is no need for the light to come in different directions, so that's pretty neat^^)

I tried to reverse engeneer it (in case I clicked something and didn't realise it), but as soon as i changed the rotation on one light the orange glow was back, so I guess this could be the problem.

Hopefully this helps someone.

Much love <3
bb.

 

worked for me, thanks!

 

Also had this problem, changing the active scene to the scene with the light source solved it. Unity 2021.3

 

I had this issue also.
I was using a system where I load in a loading screen scene, unload the current scene and load the next (requested) scene.

When the loaded scene became active in play mode, the lights would first be darker for a few frames and then be normal.

The solution for me was to set the active scene to be the loaded scene.

 

Whenever I try to click or change any of the settings in the scene which is located in lightning nothing I can change there,I can only change the lighting setting asset.and I can't even change intensity


Kindly give a solution for it



Thanks in advance