As I mentioned before I already had an image in mind. In such cases I start by blocking in my rough shapes and colors without any thumbnails or sketches. For this image I knew I wanted to have a street scene where the camera was pretty close to my main building. The whole scene would have a dark mood, with an old worn-out building facade. For the blocking in I used mainly a Round Hard brush (set to Opacity) and a Square brush (set to Opacity too) as well. I used some textures from my own library of textures for the wooden door and the concrete (Fig.04).
I added some additional colors to the wall, mostly gray values, and started to paint in the first window details. The windows are barricaded with some wooden planks, which adds to the eerie feeling and the whole mood. Until now everything was painted with the round and square brushes. The square brush was also used to show the first rough bricks (Fig.05).