I realise this is something you would have to be aware of as an artist (i.e. not necessarily reaching for a lighter shade for ‘lighter’ areas if you’re dealing with light and shadow), but do you know any examples of this kind of effect being used to deceive, in the same way that 3/4 sized furniture is sometimes used in show homes to give the impression of spaciousness?
Edit: here’s one example: http://www.npr.org/blogs/thesalt/2012/01/28/145865238/deception-diet-how-optical-illusions-can-trick-your-appetite
