Nate
Thanks a lot! I learned so much.

Nate
Photoshop "feathering feature" is feathering edge.

You might consider renaming the PNG file extension to .spng, where the 's' stands for Spine. This way, the file remains a PNG but with a different suffix, which can help avoid automatic compression by compilers on various platforms.

Why doesn’t the Spine Editor export resources as a single file when you choose binary export? It's because in Spine, the atlas and skeleton files need to be initialized together.

Mario
Disabling PNG compression will increase the app size, which will affect the overall package size.
https://developer.apple.com/documentation/xcode/reducing-your-app-s-size

changing the Atlas PNGs to a Data type:

Hello,

Recently, I've been testing the Spine iOS SDK and encountered an issue. When I drag a Spine resource into Xcode and run the build, the character appears different. This issue arises particularly when the Spine Editor project uses resources that have been feathered in Photoshop, leading to a loss of quality during the packaging stage.

After investigating this issue thoroughly, I discovered that it stems from Xcode’s “Compress PNG Files” setting during the packaging process. Unfortunately, merely disabling this option isn't effective. To circumvent this issue, we should consider changing the Atlas PNGs to a Data type, which prevents PNG compression.

I've noticed that if you don't use the feathering feature in Photoshop, the compression of PNGs doesn't affect the quality. Therefore, I believe it's crucial to specify this in the documentation or guidelines to alert users about this potential pitfall.

I have already sent the files via email