Metro Station

The metro-map metaphor taken into the third dimension, the way a station atlas draws Shinjuku: activities are circular platforms, object types are colored routes, horizontal position is process order — and vertical position is accumulated elapsed time. A wait is therefore a literal descent, drawn as a translucent elevator shaft for a long one and a staircase for a short one, so the two-day gap before payment is a two-story drop rather than a number on an arc. Depth is a genuinely new axis rather than a second encoding of object type, which is why color stays free to mean what it means everywhere else in Promenade. Interactive: orbit it, flatten it back to an ordinary 2D metro map, and switch the depth axis between linear and logarithmic. Rendered with three.js WebGPURenderer, falling back to WebGL 2.