Just remade my characters portrait and it looks like 4Kb overcompressed jpeg. What a hell?! May this be fixed someway? And what’s up with hair physics? Why hair hanging in the air?
Portrait quality is always worse right after you change it. They’re not going to waste resources to optimise your portrait every time you change it, because it’s very likely you will change the portrait a few minutes later again. And again. At least that’s what happens for me when I’m updating portraits, I keep tweaking it.
Have patience. A few hours (or a day) later the portrait will have been optimised and will look much better.
Edit: The hair is weird though. Maybe try another haircut or other stance?