I made this billboard as the top piece for a massive office building that I am making using Mr. Mich's 28mm Modular Building. I modeled it after a typical modern rooftop billboard sign, of the kind that you see everywhere in LA or most modern US cities, but smaller and more compact to fit a typical wargame table.
If this ends up being a popular design I will revisit it in the future and make larger and longer versions of it that are more to scale with a real-life billboard.
This is close to the largest size it is possible to print on the Monoprice Mini. To fit the build plate I had to turn the model 45 degrees in Cura.
I used automatic supports generated by Cura, but removing them was a pain. I broke one of the ladders while removing the supports, so I went back and redesigned the model with heavier ladders. All the same, be very careful removing supports around the ladders and trusses.
I made this from scratch in Blender, working off of a photo of a rooftop billboard in LA.