Photogrammetry of a rock with swirly grain to it on a beach in New Hampshire, made with 10 photos and reduced to about 50k faces (from 3.8 million).

On desktop, left-click and drag to rotate around the object, right-click and drag to move the object, and scroll to zoom. On a mobile device touch and drag to rotate, and pinch to zoom.

(Works best on a computer, still working out kinks in the mobile implementation.)