Full-page photographic backgrounds on the web are big, bold, and beautiful, but it can be a challenge to ensure the subject area remains visible across all devices, orientations, and window sizes.
Take, for example, the awesome 404 page over at Disqus. They use a random animated GIF from popular TV and film, and it generally works well, until you hit the Han Solo scene.
Uh oh, indeed. On closer inspection, Han can be found hiding beyond the viewport because the background image, shown in full below, has not been positioned and scaled appropriately for a mobile device.
... read the whole story at www.jpap.org.