So lately I hired a UI artist to sketch out some UI for my upcoming game “Strike Force!”, while uploading at the pictures I noticed they had small white streaks on the border of the pictures. Little help …
This is usually caused by weird transparency stuff in the background.
Here’s a good example of this with some of my earlier uploads. I erased the background instead of setting the pixel transparencies to 0. When you stretch the image it averages pixels together to smoothen it a lot, and you get stuff like artifacts around the edges.
They’ll be stretched (averaging pixel colors) as long as the display resolution isn’t the native image resolution you’ll get the artifacts. Only way to fix it is to fix those transparency pixels/missing pixels in photoshop or something.