itch.io

this happens when you import images into unity. There are a good deal of settings you can play with to get the settings correct for what you need, the filter to point as you mentioned so there is no smoothing helps a lot. It’s not something the artist can help with, but you can set the texture import settings to how you like it so that everything else you import will be set that way for you. 

Hey, I am not to sure why this would occur on unity. I know that there's stuff that has to be modified (like you mentioned the filter thing) aside from that I have no clue.