Coral reef sketch March 11, 2018 By Stuart Green in drawings, Illustration, moleskine, pencil, picture book, sketchbooks, Sketches, stuart Green, The Cleaning Station No Comments Tags: Coral reef, drawing, Illustration, pencil, sketch, sketchbook, sketches, stuart Green, The Cleaning Station A coral reef sketch for my picture book; The Cleaning Station. Took a while to sketch this. Coral’s a bit complicated to draw. Still, passed the time.