You should start using PNG as fileformat for exports instead of JPG.

mairo said:
You should start using PNG as fileformat for exports instead of JPG.

Well, I prefer exporting as JPG 90% since filesize of PNG is ridiculously large for my drawings. For example, filesize of PNG vs JPG is 3400KB vs 574KB for this ampharos drawing. But there is no notable quality difference in those two case - so I rather keep using JPG 90%.

bboing said:
Well, I prefer exporting as JPG 90% since filesize of PNG is ridiculously large for my drawings. For example, filesize of PNG vs JPG is 3400KB vs 574KB for this ampharos drawing. But there is no notable quality difference in those two case - so I rather keep using JPG 90%.

That sentence wants me to pull my hair out and only responce with "that's stupid", but I'm trying to explain as much as possible.
e621:image_quality

Filesize limit for PNG images here is 75MB for a reason. ...even FAs 10MB limit is way above that and that's considered absolutely tiny in modern standards, I know many artists even complain they can only upload up to 10MB files so they have to link to here, inkbunny and other websites and clouds to link to full quality version always. Even uploading couple megabytes should only take seconds with modern internet connections and for viewing sites that are sane do sampling so viewers with lower bandwidth can use those.
I have even had commissions where artist only gave out JPG so I demanded PNG copy for myself as that's the only way to properly store the image and I literally paid for it's creation.

Difference is that PNG is lossless, all pixels are exactly how they are supposed to be. JPG is lossy format for photographs, it throws away information by approximating how things look in 8x8px macroblocks. You start to get compression garbage around high contrast diagonal edges and reds will bleed really heavily.
So that's why I'm so confused because if you are using 3000x2800 for resolution, then why waste it by using lossy fileformat? Wouldn't you save even more by additionally downscaling at that point and that way you could also have higher quality on Furaffinity as now they downscale and recompress it there thanks to this (and causes stuff like post #3865610 here). I would also hope that WebP, AVIF and HEIF get supported on more websites as if people still want to use something as awful as JPG, at least we could get higher quality with even lower filesizes.

Also 3.4MB for this kind of style without noise does sound slightly high. I can't test with this myself, because it's JPG, the information has been completely destroyed already :V
But couple things that are coming to mind is that from your software:
PNG compression level isn't put to max, where with JPG the more you compress the worse image looks, but PNG is lossless so even at maximum compression it looks exactly the same.
Another one is that if your software is saving it at higher color depth. 24 (when no alpha) or 32 (with alpha channel) bit depth is standard and similar to JPG, but you can actually have even higher amount of colors, which is crusial if you need to edit the image further and some software actually default to much higher bit depth to save the information. At that point it would mean that JPG is accidental solution to the problem, simply because JPG doesn't support higher bit depth and switching to it forces lower bit depth.

There's also software like Pinga you can use to make filesizes much lower, this JPG I shaved 5% (30Kb) from filesize with it with zero alteration to the image. Only need to remember to have settings at maximum with all turned to lossless instead of lossy and keep backups as it overwrites the files.

mairo said:
That sentence wants me to pull my hair out and only responce with "that's stupid", but I'm trying to explain as much as possible.
e621:image_quality

....

Oh, I didn't expected such a detailed reply about the file format. I understand that e621 is very generous about the large filesize and PNG is a superior option, but since I prefer having "zero latency" for browsing submissions, I think applying lossy image format for exporting drawing still makes sense with proper quality setting.

I had no idea that this kind of problem was giving stress for you, I apologize. But still I have own reason for using JPG for my submissions. And thank you for the comment 😽💕

Besides, I may change file format to .png as you've recommended since FA is now forcing the resultion under 2K. I was been using .jpg when such limitation could be bypassed by replacing the image of the submission.

I'm just here to say I love ampharos, and also me next~