Creative effects to use with watercolors Unfortunately I don't know what the original source of that image is. I've tried looking for it with Google, but I only come up with pinterest, weheartit and tumblr.
This is probably one of my personal favourites for watercolour paintings. This drawing just allows the viewer to see the great difference in contrast and tone from the light source. As you can see, the light source piercing through the windows are yellow/orange-ish whilst fading gradually to blue and dark grey. I love it!