Curiosity rover used its arm mounted MAHLI camera to capture close up images of one of the knobby/bumpy rocks in its workspace on sol 4479. Attached is an animated GIF using three focus stacked images that were acquired by moving the rover's robotic arm between images. The camera standoff was 25/30cm from the target which provides us with an scene width of ~15cm. Credits:NASA/JPL-Caltech