Radial City

A complete 1,200 × 1,200 m city on a radial plan: a plaza inside a circulatoryring, 16 radial avenues, four concentric rings, a square frame avenue and anorthogonal grid outside it, with 45° diagonals landing exactly on the framecorners. 369 blocks, 792 street segments, 424 junctions, 16 of themsignalised.

Everything is instanced

7,122 placed objects resolve to 27 prototypes and 108,424 unique triangles.The same street lamp stands 445 times at the cost of one. In USD this survivesthe export: the stage is written with instanceable references, so the rendererand the physics engine only ever see one copy of each mesh. The whole city is a5.7 MB .usdc.

Four formats, and USD three ways

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Every folder also ships 24 standalone prototypes and its own 23 PNG maps.

The road corridor

• 14 m carriageway, two 3.5 m lanes each way, right-hand traffic
• lane markings as real geometry, not a texture: centre lines, dashed dividersgoing solid on approaches, edge lines, zebra crossings, set-back stop lines
• dropped kerbs at every crossing — 150 mm ramping to 20 mm over 750 mm, with thefootway cross-falling with it and tactile warning surface on each landing
• footways with a technical strip at the kerb for lamps, signals and bollards
• junctions pave themselves from the quadrants of the cells around them, so theradial, diagonal and orthogonal junctions all come out watertight

Traffic signals, ready to drive

Japanese-pattern hardware: horizontal three-aspect heads with arrow sub-panelson far-side masts, kerbside repeaters, and two-aspect pedestrian heads —68 masts, 52 repeaters, 104 pedestrian heads.

Two independent phase groups (A / B) with their own lens materials, so a realphase runs without de-instancing. Every head carries signal_id,signal_junction, signal_arm, signal_group, signal_heading_deg andsignal_mount, exported to USD under userProperties. Lenses ship switched off.A phase machine with a viewport panel is included.

Also in the box

2,538 buildings in five types with real window openings, modelled joinery,balconies, entrance doors and four roof colourways · 2,239 trees in four species· 1,857 street and pedestrian lamps · bus shelters, benches, bins, hydrants,billboards · and a working horizontal sundial on the plaza, hour lines laidout from the site latitude, that tells the actual time.

Built to a SimReady checklist

• metric, 1 unit = 1 m, Z up, identity world transforms, origins at bottom centre
• CapitalCamelCase naming, no dots, no duplicates
• one material per mesh, Principled BSDF plus image textures only — no proceduralnode graphs, so USD Preview Surface gets real maps
• zero non-manifold edges; windows are real openings, not overlaid planes, sonothing is coplanar and nothing z-fights at any distance
• every complex prop carries a welded, watertight, convex *_phys collision meshtagged simready_role=collider and physics_approximation=convexHull

Notes

Base colour and roughness maps only, no normal or ORM maps. Advertising panelsare blank — drop your own artwork on AdvertPanel. Static environment: novehicles, no animation. Keep materials/ next to the stage; textures arereferenced relatively.