Photoshop has become so dominant that you can use its name as a verb, but if you want to get your hands on it you need to shell out at least $10 a month. Don't worry! There are plenty of completely free alternatives to Photoshop; here are a few of the best.
It looks simultaneously familiar and strange. Solarization reverses the shadows and highlights of an image, creating a sort of opposite world. And for this week's Shooting Challenge, you're going to try it out.