I downloaded a picture from a tutorial on how to create Flappy Bird in Unity: https://www.youtube.com/watch?v=ihvBiJ1oC9U
When I use it in Unity it works perfect however when I try to make any changes to it, whether by simple "Paint" or "Photoshop", the picture turns blurry and I can't understand why, here is a video where you can see the problem: https://imgur.com/a/RtB14Wu
Here are 2 of the picture's details page, on the left, the one I downloaded from the tutorial that works good, on the right the one I simply changed some pixels in "Paint": https://imgur.com/a/W48Gte2
