Good settings for vector export for instagram?

Question

Adobe Illustrator

I work with vector. I export for insta. I save the AI ​​file, set the canvas size to 3k by 3k, open the AI ​​in Photoshop, then:

save as jpeg, quality to the maximum, a kind of "basic" format. At the output, jpeg weighs 15mb, resolution is 12.5k x 12.5k, I upload it to insta - the quality is disgusting. Yes, I understand that insta “cuts” the quality very much, but I just look at others and there are better transitions and contours. Or maybe I'm driving. No link to your profile.
I tried to save in PNG - it got even worse on the curves (you can see the "ladder"). I uploaded the same photo to Instagram with the same settings, one in PNG, the other in jpeg. I already tried to export, save, change the settings in every way - it's still some kind of garbage. Maybe I'm doing something wrong? Maybe set another dpi (but it seems like I tried it and insta crashes at 600 dpi), I tried the canvas size above 5k - it also crashes insta. Stopped at 3k. Maybe not save through Photoshop (but then the problem with color distortion is excluded), maybe something else. Can initially create a document with some specific settings? I am creating a base template.

It seems that here ppi refers to raster effects, which I do not use.
The people, if you know, if you have found some optimal settings, please share, you are tired already.
Here is an example of someone else's vector, but with normal quality - https://www.instagram.com/p/BrMW8J-DZkR/?utm_sourc...

Answer 1

You are not the only one asking this question. Yes, the algorithms of insta, alas, began to create even more severe compression. If you want to stick to more or less normal quality, with the least amount of artifacts, post a picture in 1080x1080. I also personally noticed a reaction to colors, in b / w variations of photos, graphics, etc., the quality remains almost unchanged, the contour is clearer, and with a blue or red background (if this is an illustration, for example), “halos” and “blurs” appear.
dpi is important in printing, not in screen display, where 72 points is the standard