To Wraith: If you use shi-painter, there's an option that lets you chose textured brushes, like the checkerboard one MelissaMissy used. I can't remember where you find it though, sorry. :(
On shi-painter go to the colour, click it and change it to textures. Pick the texture you want and colour. I did mine with water paint brush (or whatever you call it) so the colour is light. Anyway thank you very much guys, I will change it to 4 fingers later on when I´m not busy. Keep commenting.
drawn in 59 min