Some posts have blurry image

[Kehet]

Describe the bug

Some posts have a very blurry image when enlarged, despite the default UI having a crisp image.

I think this is because Photon uses an image hosted on my home instance instead of the original instance. However, I'm not familiar enough with innards of Lemmy to know if this is because my home instance is somehow misconfigured, or if this is a problem with Photon. Posting here first because the default UI doesn't seem to have this problem.

To Reproduce (if applicable)

My home instance is sopuli.xyz, and I'm logged in as a user from that instance.

For example, my feed has this link
https://phtn.app/post/sopuli.xyz/19496823
which uses low-quality image from my home instance
https://sopuli.xyz/pictrs/image/46f77cdf-9771-4266-9b15-0bde2e6bc80e.webp?format=webp
(this is 105x512 webp image)

Same post using another instance
https://phtn.app/post/lemm.ee/48189073
uses original image url
https://slrpnk.net/pictrs/image/4d0b5897-eed3-45ca-a50b-27f623c9b60e.jpeg?format=webp
(this is 419x2048 webp image)

Same post on my home instance using default UI
https://sopuli.xyz/post/19496823
uses original image url from another instance
https://slrpnk.net/pictrs/image/4d0b5897-eed3-45ca-a50b-27f623c9b60e.jpeg
(also 419x2048 jpeg image)

Expected behavior
When I click to enlarge an image on post, I expect it to match the original size and quality

Screenshots
See links

Versions

• Browser: Firefox 132.0.2
• Photon version: 1.31.5

[aeharding]

Probably due to LemmyNet/lemmy-ui#2796

[Kehet]

Probably due to LemmyNet/lemmy-ui#2796

Does this require my home instance to regenerate this image, or is this something Photon should fix?

[aeharding]

It’s something for photon to fix. Gotta use url and never thumbnail_url. Thumbnail_url is now tiny.