It's good that you've learnt how to brighten @fatila, but it's important not to brighten the image too much because it will look equally strange in-game.

Also keep an eye out for snow. It's what we call when the edges of the hair still retain a little bit of the background in it, and it's something which is quite visible in-game too.

remove.bg generally removes most if not all of the snow from the source image, but there may be times like in this cut when you will need to remove some of it manually 👍

Here's a brief video showing how easy it is to quickly spot and remove this snow: