Finnish artist Janne Parviainen uses a really intriguing technique in his photography, that could easily be mistaken for fancy Photoshop work. But no post editing here… Parviainen traces patterns and shapes using light sources caught with a camera on a long exposure setting. “I have traced entire rooms with a single LED light with the exposure times ranging from 20 minutes to 37 minutes,” he says. Parviainen capitalizes on these eerie effects, with really compelling results.