Selections from Sketchbook #29 (2008). These are experimental doodles drawn with flourescent highlighters. I drew in the highlights, leaving the paper alone for the shadows. When tilted at a certain angle, the negative effect is clear, but it wasn't until I photographed these sketches and inverted the colours in Photoshop that I got to see them as I had hoped they'd turn out all those years ago. It's a pretty neat effect! Darth Vader (played by David Prowse) from 1977's Star Wars . Obi-Wan Kenobi (played by Alec Guinness) also from Star Wars . Commander Adama (played by Lorne Greene) from the 1970s version of Battlestar Galactica . Tron (played by Bruce Boxleitner) from 1982's Tron .