I Scribble on paper, scan, invert [and tweak] in Photoshop, transfer to the model surface in Mudbox… its a bit like adding transfers [decals?]to an airfix kit like I did when I was a kid… a little under painting, a final wash or two and “hey presto” scribbley spotty anubis doggy thing…

[presto is a reg trade of pixar inc]