The default wallpaper is indexed to 8bit color resulting in severe quality degradation with very visible color banding to marginal filesize benefit. I filed an upstream bug*, but figured the processing is probably happening at package build time. * https://github.com/fedoradesign/backgrounds/issues/57 Reproducible: Always Expected Results: Specific file format choice, dithering method and color depth is something that needs to be taken depending on the source material. Indexing every PNG into 8bit, however, seems like a wrong choice to 95% of cases.
The processing happens in the upstream makefile, which is run at package build time: https://github.com/fedoradesign/backgrounds/blob/main/default/Makefile#L24
It was added in this misleadingly-named commit: https://github.com/fedoradesign/backgrounds/commit/8226ee7a90ca7b817b64bd2358e96d1ec1b73d1b
Proposing as a Beta FE, obviously having an as-intended version of the backgrounds for Beta would be good and cannot be entirely done with an update (you'll see the dithered one on live boots).
FEDORA-2023-dcb2b2bb93 has been submitted as an update to Fedora 39. https://bodhi.fedoraproject.org/updates/FEDORA-2023-dcb2b2bb93
+3 in https://pagure.io/fedora-qa/blocker-review/issue/1301 , marking accepted FE.
FEDORA-2023-dcb2b2bb93 has been pushed to the Fedora 39 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2023-dcb2b2bb93` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2023-dcb2b2bb93 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2023-dcb2b2bb93 has been pushed to the Fedora 39 stable repository. If problem still persists, please make note of it in this bug report.