[5.3] Elements in the UI flicker between different sprites

Cool stuff! You guys are great! Keep up the awesome work.

I found that if you don't move your canvas, it doesn't flicker AS much. (Nearly none) What I did was have an ortho camera that has the canvas as a child to that camera. The ortho camera only renders the UI layer, and the player camera doesn't render the UI at all. The ortho camera never moves in the scene. It seemed to work nicely. Still nowhere near a fix though.

 

The 5.3.2p1 patch is out, guys:

https://unity3d.com/unity/qa/patch-releases

Hope it really solves the flickering issues.

 

Nice ! that's work now Thanks

 

The patch did not fix my issues at all. Everything still appears exactly as it does in my previous post.

 

to verify you tried 5.3.2P1 not 5.3.2f1 right

 

Ok, 5.3.2p1 fixed all flickering issues for me. Great work guys.

 

Do yours flicker in a frame, or are they like that all the time?

 

5.3.2p1 also fixed all flickering issues that I has having. Thank you guys.

 

Also confirming 5.3.2p1 fixed it for me! Glad to hear the bug's been found and squashed

I'm curious if you can share any info on what would cause a bug like that? Just wondering, it had pretty unusual behavior

Thanks again!

 

Thanks for this Unity! All is working well so far!

 

Sure, So the issue was pretty much data corruption. What was happening was when we were uploading the shaderPropertySheets to gfx pipeline we were passing them by reference. What we needed to do was have them copied. This is because with Unity's threaded rendering back end the next frame was starting to be processed before the current frame was done being drawn. As you could likely imagine if the frame wasn't drawn before we started to recalculate the batch/ property sheets for the next frame you'd end up with invalid texture references in the current frame.

Dont you just love threading . I also have to give a big thanks to Karl for lending a hand even though the UI is not his responsibility. As a random note between the two of us it took a solid week of work (80 hours combined not including the late night and weekends) to find the issue to replace a total of 8 characters .

 

They flicker in a frame. The screenshot captures an exact frame where it occurs. And the gif shows me cycling between two buttons in my UI that cause the flickering to occur.

 

Correct, I am using 5.3.2P1. Just double checked. My project folder is enormous, so it would not be reasonable to upload it for a new bug report.

 

Ouch, that sounds really painful - gotta love threading, indeed. Thanks for the details, and once again cheers for finding and squashing it!

 

So the flickering is exactly the same? Can you get a new screenshot with version 5.3.2p1?

 

Too bad theres no utility script to check that its not Z Fighting with anything else!

 

I was able to catch it again and slow it down in a gif. I am using my keyboard arrow keys to navigate from the 4 icon to the 2 icon. For a single frame I get glitched text and sprites. The large numbers on each button are actually sprites and everywhere else is text. This seems to be the same issue that others were describing here. I am using the 5.3.2p1 patch that others have said fixed their problems, but it has not fixed mine. It has been a while since I have worked on my UI elements so I don't know for certain when this problem began, but I do not believe it was present for me in 5.1.

 

Definitely using the patched version. I'll see if I can take some time to create a reduced file size version of our project folder, but vpn details would be helpful regardless. Thanks for the quick reply. Hope to get this sorted out soon.

 

So far, the new patch solved my issues as well, I was experiencing a HUGE amount of flickering beforehand.

Many thanks to the Unity staff. Fingers crossed that annoying bugs like that won't ever come up in the future.

 

New patch solved my flickering. Thanks for the help guys!

 

Great job Phil and Karl! Fixed out issues! Thank you so much!

 

Thanks devs patch works great.

 

What are you trying to say with your attached images? At least please provide some descriptions, even if you think it's obvious to yourself.

 

5.3.2p1 fixed it for me as well.

 

Are you guys testing 5.3.2p1 in the Editor? Coz on iOS (5s, 6s+, iOS 9x) even small test project with UI (1 Button) just shows empty screen, while working fine with 5.3.2 vanilla.

 

Hmm havn't personally tested outside windows editor/ standalone but i'll try and get to it today for ios and see.

 

Is there some related issue that's still unfixed? I was following this and waiting for a patch, but unfortunately 5.3.2p1 still flickers for me. The project is under NDA so unfortunately I can't post a repro.

 

Any news?

 

I am very angry with your guys,when i ask you about ETC1+ alpha features.You just delete my care and said "Your post in the thread [5.3] Elements in the UI flicker between different sprites was deleted. Reason: This is NOT related to this thread start a new one or search for the one that is already there about this. " Are you kidding me? If ETC1 does not have alpha texture,things would be all right.But if you set the Apha teture and MainTexture.The fliking problem should be appeared agin.@Phil-Unity you should ask sandbox and check this link http://forum.unity3d.com/threads/etc1-alpha-feature.350184/#post-2491053

 

Yes!I am so sorry about when i use unity5.3.2patch2 ETC1+alpha features,I meet this problem.Please check this http://forum.unity3d.com/threads/etc1-alpha-feature.350184/#post-2491053 you could know all about how to flickers ui again.

 

Right but when you are asking for the ETC1 + alpha as a feature for the UI with no mention that when it is used it causes the same issue then yea the post is not related at all to the thread therefore they were deleted. The fact you are experiencing a flickering issue with a format that is not supported by the UI at this time is not necessarily a surprise but is still different then the issues described in this thread. I'd recommend not using the ETC1 + alpha at this time as it is NOT supported by the UI.

 

So, whatever it was (probably something related to IL2CPP) it's fixed in the recent 5.3.2p2

 

Well,I don't think it's a format problem,It could be the different alpha value but the same uv texcoord.I test this problem,if i use the same atlas(fmt34) and the associated alphatexture (same uv fmt4) coord on the same UI ,There would never be flicker.But if i use different atlas at the same UI,the result you could see( flick).The key problem is your canvasrender dose not have a exposed API that just like Graphcs.DrawMesh can use materailproperty.Would you tell us the right time can be supported by the UI? Leader

 

I used the associatedAlphaTexture the formt is RGBA(fmt4) as the following 1.png.

 

Can't really confirm if something has been fixed because last 4 version of Unity makes crashing Android and iOS builds.
Only way to get them not to crash on splash is to use Mono and stripping of.
But the fonts are still broken. I just built with Unity 5.3.2p2 and on iPad I got immediately corrupt fonts on the screen.

 

If you meant crashes on Android and iOS builds for previous Unity builds, would these be related?

http://forum.unity3d.com/threads/unity-5-3-1-android-playerprefs-crash.380364/ (Fixed for 5.3.2p2)
http://forum.unity3d.com/threads/un...nfortunately-project_name-has-stopped.372577/

And this one confirms the crash issues are fixed in 5.3.2p1:

http://forum.unity3d.com/threads/editor-crash-in-5-3-0-when-targeting-android.372831/

However, like what @johnpine said, the last 4 versions of Unity (probably including patches between 5.3.0 and 5.3.1) is unstable for Android.

 

Might need to wait on @johnpine, since he is the user with the font issue. I was just adding on to his post saying there are some issues with previous Unity builds.

 

Yes,I did.But my project need ETC1 to decrease the apk file size.But i tried the sandbox's way use the shader like Sprites,and It just did not work.The UI element condition is more complicated than a single sprite.Can you give me a right solution or tell me the roadmap

 

@xjqxzyr Our devs feel this is a separate issue, can you please create a new thread about this so we can keep conversation on topic, thanks.

 

Ran into a bug that seems like this with 5.3.2p3. Repro package posted under case number 770460.

 

The patch 5.3.2p1 fixed flickering issues on my application, but if I switch my camera from Screen Space- Overlay to Screen Space - Camera, the flickering comes back again and is even worse than before.

 

The patch fixed the issue for me. Nice work! Thank you very much!