[LWRP][Android] Linear color space looks very different on different devices

Hi devs,

I just tested linear color space rendering with a default scene (standard skybox, one object) using Unity 2019.1 beta 8 and the latest LWRP. I noticed that the result looks very different on my two devices (a Galaxy S6 and a Pixel XL 1st gen). It's clearly wrong on the Pixel, with colors appearing much darker and more saturated. This difference disappears when switching back to Gamma space.

Will post #issue id once it's sent to me. Cheers /Wendi

 

Bug report is found here.

 

on 2018.3 with lwrp 4.10 preview linear space rendering is ok, so why this is a gpu driver problem?

 

Apparently it's rendered OK on some devices but not others. Here's the response I got to my bug report a few weeks ago:

Thanks a lot for reporting the issue.

The issue is known to be a GPU drivers bug, which is out of our hands to fix.
The issue's public link can be found here:
https://issuetracker.unity3d.com/issues/android-linear-color-space-causes-darker-scene-rendering-than-expected
If you stil lhave questions, feel free to contact us again!

Best regards,
Vaidas M
QA Team​

 

@aleksandrk Hi, any news with progress on this?

Thanks.

 

Does that mean that linear color space (with LWRP) will be supported and recommended on all Android devices? (That's quite a crucial issue for us, it's not too late for us to change from gamma to linear but it soon will be.)

 

Thanks! Only 1/5 of phones still don't support OpenGL ES 2, so we'll go with 3...

 

Oops, typo
According to Google, it's currently at 21% (which also means that it's decreasing quite fast), see https://developer.android.com/about/dashboards/

 

Just wanted to chime in and say we are having this issue too. The game looks the same with Vulkan (Linear), Vulkan (Gamma) and OpenGL3 (Gamma). But when we swap to OpengGL3 (Linear), everything just looks 'darker'.

 

I'm definitely still experiencing this issue with 2019.1.4f
The first Image attached shows the difference in UI elements in the editor and my Xperia Z3. I was able to reproduce this bug by testing on other devices;
Xperia Z3 - ‎OpenGL ES 3.0 - Bugged
S7 edge - OpenGL ES 3.1 AEP - Bugged
Pixel 2/3 - ‎OpenGL ES 3.2 - Working fine

Second Image is very different as both lighting and ui elements are much darker, this just the basic LWRP project with android platform

Third image is the logcat log from launching my actual project

 

I have. Waiting to see what happens now. I'm going to try to install ubuntu to see if i can reproduce it there too.
EDIT: Yup, same thing...

 

Can confirm that this problems persists with any unity 2019 version + any version of the LWRP package ... However, in unity 2019.1.4f1, using vanilla RP + Blit Type always returns the correct colors....

 

How did you set the Blit type to always? Mine is greyed out...

 

i have the sample problem 2019.1.8f1, i cannot change blit type, i think it is not a gpu error. another apk is good

 

Hi! I have the same problem on GLES3 android with Linear. I have some track about it: there is two problems, I think(please Unity check my info).
1) In LWRP package
2) In Post-Process package
First of all, if you create default project with for example 2019.3.0a8 with default LWRP package(6.5.2) and default PP package(2.1.4) and build scene(check GLES3) it should be darker on Android, but if you turn off Post-Process Layer on main camera and Post-Process Volume and build again -> it should works fine. BUT Next point very important: Update LWRP to 6.7.1+(or 6.9.0) then you will get always darker scene in build even if PP Layer and Volume turned off. And also in the same time you got a new PP 2.1.6+(or 2.1.7) and if you turn it on then you will get fully broken render(it just cant render scene you can see only UI but all 3D will glitch).

p.s. you also will get error after update LWRP to 6.7.1+ on 2019.3.0a8 about UnityEngine.Experimental.VFX.VFXManager.ProcessCamera(camera); just delete "Experimental" to fix that

all of that I've tested on my device Samsung Galaxy Note 3 with adreno 330

And yeah, this is problem not only on Unity 2019.3, first time I've got this issue on 2019.2 when update to LWRP 6.7.1, but issue with Post-Process was all-time for me, I can't make it work right on GLES3

Thanks

 

Have the same issue on 2019.3.0a8 with LWRP 7.0.0

 

Done

 

Is there a link to issuetracker. Thanks!

 

For 2019.1 it's in planned state. Please apply this fix for 2019 asap. After strange togglegroup bug, we are now waiting for this bug to upgrade to 2019

 

my unity version is 2019.1.10

If graphic api is openGLES3 and color space is Linear; scenes still rendering much darker on some devices.
(for example : samsung galaxy J7 max)

 

In 2019.1.12 scenes are still rendering much darker on samsung galaxy j7max. Is there any good news about that.???

I couldn't try vulkan because device doesn't support vulkan.

 

Same on the new version 2019.2. LWRP 6.9.1.
on Xiaomi RedMi 4A(Adreno 308), HTC One M7 (Adreno 320). All using OpenGLES3. Using Vulkan (Galaxy S8) all works OK. All without any Post-Proces.

In my game, I use a Camera to take in-game screenshots and they appear darker too. Even if I take screenshots using editor. Maybe it somehow related.
I used code from here: https://docs.unity3d.com/ScriptReference/Camera.Render.html

 

This is the issue, please vote: https://issuetracker.unity3d.com/is...pi-set-to-gles3-and-color-space-set-to-linear

 

+1

 

It says the fix is in Review, can't wait!

 

Hi @aleksandrk and @jonasj_unity. Any plan to backport to Unity 2019.2 with 6.9.x version?

 

Of course, it's only going to work once this bug (1136069) is fixed as well, which right now wrecks my and other people's Unity editor (2019.2.1f1, two days old, installed with JDK option and no other Java environment on my system) when switching to Linear color space for Android.

I'll light a candle the day I'm finally able to switch to linear on Android...

 

This problem happens at 2018.3.0f2 and 2018.4.7f1 without using LWRP. Any possible solution?

 

Hi! My 2 cents ..

Spoiler: Editor

Spoiler: Ancient Honor 6A DLI-L22 Android 7.0 EMUI 5.1.3

Thanks)

 

This doesn't worked for me. I'll send a bug report.
Anyway Thanks!

 

I found a simple solution, but it's not good for performance I guess.
Turn off "Use 32-bit display buffer" this option. I don't think this is a good solution, but it's ok for testing looks in android.

Edit: Turn on this option, I wrote wrong.

 

Unfortunately, the same even with "Use 32-bit display buffer" turn off

Spoiler: boom

 

Oops. My mistake. I turned on the option. Sorry. I'll edit it.

 

Is there a timeline for 7.1.1 release? It's been in testing for a while now. Don't want to rush you guys, it's better to avoid bugs, but knowing an approximate date would help me plan the release of my game

 

I write my own SRP and i have same problem too.

 

UGUI elements became darker too. So i think this isn't SRP code bug, it somewhere inside unity OpenglES realization.