Advanced Lab

Generated fixtures. Real renderer. No live data or publishing.

SYNTHETIC / READ-ONLY Explore the demo

Try a scenario

Choose a preset, focus a city, then watch it grow. Technical settings stay tucked away below.

Preset View City (select to focus)

Watch it grow

Add to each city, grow one step, or play through growth. Step back reverses a growth step.

Advanced scenario settings

Fine-tune the synthetic fixture. Apply numeric and waterway changes with Apply scenario; other selectors apply immediately.

Seed Simulated cities

Districts / city Base buildings / city

Growth step

Growth favors the first corpus district in each city. Each step adds 10% of the base (at least 10), up to 3,000 buildings per city.

Waterways Layout policy

Production uses the current placement algorithm with synthetic districts and metadata. Reserved parcels test an alternative growth policy, not the deployed default.

Data path

Simulation runs on your device, not the server. No live data or Gateway sign-in is used. Fixture Gateway testing requires pnpm city:lab in a local checkout.

Simulated access District scope

Import and export a scenario

Save or load a local JSON configuration, not live content. Import replaces the current scenario.

Import scenario

Visible cities

Each island contains its actual building instances. Select a city to inspect it alone.

Inspect

Find a building Building

Select a building on the map or from the list.

Visual and debug controls

Roads, parcels and island outline Island scenery Animate traffic and pedestrians Time of day Auto-fit camera after changes

Preparing the city...

Synthetic city

Scene diagnostics and fidelity

Waiting for a rendered frame.

Scenario report and diagnostic findings