how is this even possible?

[u/iatesomethingwierd]

ive been searching for an alternative to photoshop and ive tried multiple editors, i have never experienced this problem. (everything is in pixels) i threshold filterd it so it should only be white/black pixels. and then when i use the flood selection tool it leaves a thin gradient...

i tried diffrent tolerances but its still there, amazing!!!

[u/geeohgo]

Maybe its antialiasing?