Philip,
Nils, as I, just prints them. Here's a close up (Devil's Mountain is one of the group's two return loops). I tend to use Matte Premium Photo paper, not sure if he did that, or used a decal/label stock and then mount on sheet styrene. His storefronts are decal stock.
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Nils also hand made each of the light standards. They are 0402 LEDs.