Keep your pen moving

One of the most useful bits of advice about doing creative work that I've gotten is "Keep your pen moving." A random side project I have been working on has been to turn a friend's kid's doodles into a sticker pack. The challenging bit is that what I have is a badly taken photo of 3 sets of sketches he had done over several days, the lighting is different, the line-widths are different, the fill…