Contrasts – Daily Post photo challenge

The Daily Post photo challenge this week is all about ‘contrasts’.  
http://dailypost.wordpress.com/dp_photo_challenge/contrasts/
I like this prompt :-). There are so many options: rough/smooth; round/square;  tall/short …
I’ve just been doing a study of houses and rooftops, sketching and drawing them from real-life and from photographs. Here is a contrast of poster media illustrations of houses in front of real houses, a contrast of styles and 2D and 3D.

Here is also a photo of two sketches in my journal showing contrasts of a black and white image of roofs, chimneys and styles. The one on the right was sketched today :-). These sketches also contrast with the mass produced advertising posters shown in the first photograph!