Concerning the relevance of painting to a photography site... I think I made my point in my original and subsequent post that it is possible to make a link between this (Magritte's) painting and photography on the basis of their use of light.
I don't think any art has ever developed in isolation, and photography has had a deep, and reciprocal relationship with painting since the 19th century. It's hard to understand painting during the last two centuries without some awareness of what was going on in photography, and vice versa.
I'm not trying to discuss the best brush, or what pigments for autumn skies, but I'm interested in a little bit of cross-media dialogue. Some people here are also painters, and their opinions on photography are very interesting because they can take a different perspective on the medium.