When it comes to designing graphics, one of the most important elements is a transparent background. A transparent background makes it easy to layer images and text, creating a cohesive design.

On the iPhone, this gives you a home screen that looks very unusual: You can see more of the background image than of your apps. The optional widgets are also transparent, and the control center ...

Model sheets, concept art, and backgrounds from the Nickelodeon series Aaahh!!! Real Monsters ...

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