Draw a sketch to define the tones

Here is the moment to try for example

a dark sky and a lighter building.

Sketch quickly allow yourself 20

minutes maximum. Don't bother

with the details

Sketch out the building. We used masking

fluid on the roof ridge and the window

panes.

Start with the sky wet-in-wet darker at

the top then take out cloud shapes with

kitchen paper. Wash in the roof with