Lightmap textures become darker when swapping from PC to Android.

Our lightmap textures become darker when swapping from PC to Android.

Not using Precomputed Realtime GI. Only using Baked GI. Ambient Occlusion enabled. No lights in the scene. Ambient color light gray. (85% rgb). Our goal is to bake ambient occlusion.

The bake looks fine on PC, but when we swap to Android the lightmap textures become darker (Even if we re-bake the scene). Looks completely different.

Left is PC, right is Android

 

Are you on 5.5.0p3?

 

No, I have tried this on 5.4.1f1 and the latest beta.

 

@AcidArrow tried 5.5.0p3 as well - same issue.

 

yes...I have the same problem,is baked system available in Android platform?

 

My guess would be the the color space, Linear on desktop VS Gamma on android.

 

No both are set to Gamma on my end.

 

do u guys found any solution for this????
I m facing this problem too...... I on latest unity build (2017.1)

 

I've seen this in a few build around the 5.5 releases, but it was quickly fixed.

Since then I haven't seen it happen again and I'm building for android pretty regularly these days.

Have any of you made a repro scene? Submit a bug report with it and it could also be a good idea to post it here so we can see if it has anything to do with your specific computers or android devices, or something.

 

May be u know what is wrong with baking lightmap for android. I have read somewhere that lightmaps when used on android work as 2x LDR (converted from editor lightmap which is RGBM) so it losses its hdr information and looks dark.
See my projects screens here
May be u can guide me as u r building for android regularly.

 

That's true, but it means that some higher values are clamped, not that the overall texture gets darker.

 

So what I am doing wrong????
I pretty much checked every option in lighting window.
Please help

 

I met the same problem.
Has anyone solved it?

 

Hope its not too late to reply,
I just found that android doesn't support the baked lightmap in linear space and it fall backs to sRBG or LDR (not sure what it was called). So what I did was simply changed the color space back to gamma and pumped the ambient light very high to get a similar look. Its not the exact same but its almost same.

 

I can confirm that switching to gamma solved my problem too. It's a bit weird, as LWRP supported Linear color space well enough until I updated to Unity 2019.1.0b7 yesterday, so my specific scenarion might just be a temporary, unlucky combination of 2019.1 beta and LWRP 5.6.1 (and even LWRP 5.10.0) package...

But since I want to support a bit older devices too, if I can pull it off, I guess I'm better off with gamma color space anway.

 

I'm experiencing the same here on Unity2019.1.0f2 with LWRP v5.7.2. Looks like Unity Dev need to investigate this issue.

 

Hi @kristijonas_unity , thanks for your reply.

I tried what you suggested, but didn't fixed my issue. I tried the Lightmap quality to both 'Medium' and 'High'.

This is the expected result(Editor), and Standalone build works fine :



But on Android, it looks like this :

 

Also, I only use 1 mixed directional light so, I disabled Additional Lights and checked 'Mixed lighting' option in LWRP Asset.

 

It was a postprocess layer attached to the camera that causes the issue. But it's weird, since the postprocessing only affects a certain layer(Vehicle in my project) only, and all it does is anti-aliasing and Bloom.
I'll do another research and if the problem persists, I'll submit a report then.

 

I did some more test using another Android device(Nvidia Shield TV with genuine Android ROM) and the repro scene rendered as expected. My target device is a custom Android board(Hardkernel's Odroid XU-4 device with custom Android ROM(Lineage OS)) so fixing it looks very hard or never be achieved.

 

Facing the same issue while building using unity 2018.2.0f2 editor . Is this an issue because of postprocessing or lightmap baking ?

 

In my case, the problem lies on a hardware / OS side. My target device runs custom Android OS(Linease OS) and it looks like the OS has some bugs. I couldn't fix the issue.

 

Thanks for the reply , In my case upgrading project to Unity 2018.3 resolved the issue

 

I'm having this problem with 2019.3.0f5. Changing compression settings did not make a difference, at least for 32-bit EXR images. I'd prefer uncompressed lightmaps, and setting to None did not help either.

UPDATE: My problem is with the Unlit / Texture shader. If I use the workaround of switching to Mobile / Diffuse and then setting environment lighting to a white ambient with Intensity of 1, it works as expected. Not ideal, but hopefully it won't make a big difference for performance (this is for mobile VR, so every little bit helps).

 

I know its old post, but my case was SSAO as render feature was enabled in the render feature... removing that made the lightmap looks the same as in the editor... And I'm speaking for assets bundle not just the build

Its weird when building assets bundle and this happen to get darker lightmap if SSAO is enabled in render feature.

Should I file a bug regard that or what?