Check out this photo. Although it may look like a color picture upon first glance (and even more so if you squint or view it from a distance), it’s actually a black-and-white photo with thin color grid lines overlaid on it to trick your brain into filling in the missing color. The viral image was created by artist and developer Øyvind Kolås, a prominent developer in the GIMP open-source image editor project. Kolås took a Creative Commons photo by Chuwa…