As a general rule, make non-natural textures into png and natural textures into jpg. Natural means a real picture, like a face, a complicated screen-shot, or yo

As a general rule, make non-natural textures into png and natural textures into jpg. Natural means a real picture, like a face, a complicated screen-shot, or your office. Unnatural is something like a with simpler colors and flat textures. A screenshot of a webpage has potential artifacts in shrunken fonts when stored in jpeg.