PirTie is a visual that is similar to tie die. It uses simplistic math mapped smoothly onto a sphere. The angle of vision can be widened to see more of the mapping. That is done using the pinch zoom feature. The pan gesture will rotate the sphere. There are many images, some will look similar at first glance, but at a closer look, it is probably at least slightly different. Double tap for a new picture.
This requires an OpenGL ES 2.0 compatible device.