I’ve been trying to figure out what the culprit is for this, but haven’t found anything in the settings. This post, for example, has text that’s pretty unreadable because it’s forcing a lower resolution on it.
The image that’s given is https://lemmy.world/pictrs/image/fac38222-c5e7-448c-83e2-218d54e350eb.jpeg?thumbnail=1500&format=webp, but when you clean up the URL to https://lemmy.world/pictrs/image/fac38222-c5e7-448c-83e2-218d54e350eb.jpeg, it’s perfectly legible. In fact, if you choose to share the post link from the nested 3-dot menu on the share option (from the 3-dot on the post), it’ll give you the cleaned URL.
I’ve set it up to use both auto DPI and 400, the highest manual setting here, but it’s done nothing. Likewise, the max zoom setting doesn’t affect it, and I can’t find any way to get it to stop adding extra parameters to the URL. Is there a setting I’m missing, or is this supposed to be intended behavior?
Just went to the linked post (with the same settings) and the image in the post is perfectly legible.
I would suggest closing the app, clearing Sync’s cache, and trying the image in the post again.
After clearing the cache, this works. However, while I did mess around with the settings, I didn’t for this specific post because I had done so before, and just didn’t have time to submit a bug report on it. This means that even if you have the correct settings, it may decide to serve you the compressed version anyway, and the only way to get the uncompressed is to manually clear the cache, restart the app, hope you can find the post again, and roll the dice on the settings taking again. I don’t have this issue with every long image, just enough to make me report it.
Edit: On closer look, clicking on an image from your feed gives you the pixelated version. Clicking from inside the post, aka the link I gave everyone, gives you the uncompressed image. You can test this by clearing your cache, restarting the app, going to Greentext@lemmy.ml, and then clicking the image, not the post. Then click in the post, then the image, and magically it will be uncompressed.