So, I've been having some problems with editing Atlas directly on photoshop. On the current game I'm working, we have one original atlas generated by Spine, and I take this same atlas and change the color of some elements in Photoshop. the problem is when I do that, some artifacts appear on Unity character, at this moment one white line is appearing.
there is some specific configuration to change colors of elements of an atlas on photoshop? Maybe some PNG configuration?
EDIT:
I noticed that even without change anything on the image, but saving it with photoshop, changes its size.