I made a sprite out of a screenshot, and edited it a bit. It did not have these ghost lines, it was just a circle. Now it has these ghost lines. I do not know why they were added. Any ideas? Thanks! By the way, I am in IOS.
are you using compresion on iOS specific paltrfom with best compression quilty, I susgesst once try with true color in fromat. it will be goes. When we use compression in iOS platfrom Unity by default try to use PVRTC comprssion with POT. it will reduce texture quality, so may be those ghost line came by due to compresstion.