I often sketch details of hypothetical constructions inspired by temporary structures alongside roads and on building sites.
By developing a few of these sketches in Google SketchUp 8, I have built digital models of basic designs which can then be multiplied in various arrays to create much more complex structures.
Next, using Adobe Illustrator, I modify a few views of the structures, bring those new images into Photoshop where I merge them with recently captured abstract photographs.
This is an ongoing collection of the resulting digital constructions.