Incorrect image alpha rendering on Xcode 15b3 and iOS 17

Developer Tools & Services Xcode
nadastudio OP
Created Jul ’23
Replies 21
Boosts 5
Views 5.2k
Participants 20

I'm not sure if I'm changed an unknown-to-me setting somewhere, but since this morning, after profiling an app (metal, allocations, etc), every project I run/build on Xcode 15b3, either on simulator or on device, displays partially-alpha images blended to black, as if there was some problem in the process of compiling the PNGs (lack of premultiplying, color space, etc).

If I open those same projects on Xcode 14, they are displayed everything as they should. Also, If I open them on other computers with Xcode 15b3 other than mine, it also works fine. And it was working fine for me this morning as well, but not anymore.

I've tried uninstalling Xcode beta and the simulator a few times, cleaning folders and preferences, hoping it was some setting I changed by mistake with some hotkey, but no luck so far.

I'll attach two pictures, one from Xcode 14, and the other one from Xcode 15b3, hoping it's some silly thing I'm missing.

xc15b3:

xc14:

Replies  21
Boosts  5
Views  5.2k
Participants  20
Sathana S. OP
Jul ’23

Facing same issue with Xcode Version 15.0 beta 4 (15A5195m)

0
zhaozhiqiang OP
Jul ’23

I also have the same problem Xcode Version 15.0 beta 4 (15A5195m)

0
nadastudio OP
Jul ’23

[@Sathana S.](https://developer.apple.com/forums/profile/Sathana S.) @zhaozhiqiang I'm still having issues with beta 4 as well. Do you recall when it started happening to you? Did you use the Profiler by any chance? I'm trying to pinpoint what could have gone wrong.

0
zhaozhiqiang OP
Jul ’23

@nadastudio I only recently used Xcode 15.0 beta 4，Previously used xcode 14

0
Kubush OP
Jul ’23

Seems to be working fine again in Xcode 15.0 beta 5 (15A5209g)

0
ViktorGray OP
Sep ’23

issue still here in Xcode 15.0 release

0
ViktorGray OP
Sep ’23

Any luck with this problem ? Faced this in Xcode 15.0 (15A240d) release version.

0
ViktorGray OP
Sep ’23

Found the solution. Need to change compression type to "Basic"

3
yangtanghai OP
Oct ’23

After upgrading XCode15, I also encountered this issue. May I ask how this issue was ultimately resolved

0
yangtanghai OP
Oct ’23

After upgrading to xcode15, I also encountered this issue where images with transparent channels will have gray fill when running. I would like to ask how this problem was ultimately resolved.

0
mini_ios OP
Oct ’23

We still have same issue on Xcode 15.1 beta.

0
mini_ios OP
Oct ’23

I find PNG with alpha in Assets.car is compressed with 'Gray' color space.

0
mini_ios OP
Oct ’23

I think 'Gray' color space is no problem.

But there is a huge difference of compression results between Xcode 14 and Xcode 15.

0
byulsaim OP
Nov ’23

The issue is still occurring in xcode version 15.0.1 (15A507). Is there a correct solution?

0
LimingWan OP
Nov ’23

You can check the bits/channel of the png, if the png is 4 bits/channel, you can export to 8 bits/channel.

2
Incorrect image alpha rendering on Xcode 15b3 and iOS 17
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