The visual effect, often employed in user interface design, creates an illusion of depth by making background elements move at a slower rate than foreground elements when a device is tilted or moved. This effect simulates how objects at different distances appear to shift relative to each other in real life. For instance, icons on a springboard might appear to float above the wallpaper as a user changes the device’s viewing angle.
This design choice enhances the user experience by adding a subtle sense of dynamism and realism to otherwise static interfaces. Historically, its implementation served to distinguish the platform from competitors by showcasing advanced graphical capabilities and creating a more engaging and visually appealing environment. Furthermore, it can contribute to improved perceived performance and responsiveness.
