It was suggested I post this here, so here goes.

I've created a Gimp brush for doing painting in buildings on maps. When paired with my CityBrush.gdyn dynamics, you get a nice array of scaled and rotated houses as well. Here's a view of all 81 buildings:

citygrowermockup.png

Is this something you'd consider useful? Should I make more?

Let me know what you think.