Smoother roadside slopes
- Road cuttings and embankments now blend into the hillside across the terrain grid.
Development journal
Everything built
since May 2026.
From a deterministic traffic engine to a desktop app with 3D towns built from open data. These are development milestones, not public software releases.
- 1,685commits
- 7tagged releases
- 10 Mayfirst release, 2026
September
2026
Buildings, property by property
- Fitted bay windows, stone facade relief, joinery, roof edges and rainwater goods in the building assets.
- Glass with room depth behind windows.
- Reviewed property observations carried through the building pipeline to the desktop app.
- Facade image models tested against held-out Pontypridd street photographs.
Spreadsheets and guided inspection
- CSV preview with reversible column mapping, saved with the project.
- Guided camera moves to a selected site.
- Area and asset pages, and project loading that keeps the app responsive.
A fuller Pontypridd
- Ground cover, summer vegetation and an animated sky.
- Recovered street detail with stable road markings up close.
- World lighting on DirectX 12 Ultimate.
- Placement ranking and the asset placement workbench for camera and mast positions.
- Separate World, Analysis, Data, Live / Replay and Settings pages.
Kerbs, tactile paving and yellow lines
- Exact footway and kerb layout, with tactile paving seated on footways.
- Verified yellow line markings in the desktop road renderer.
- Laptop hardware evidence gathered on a Lenovo IdeaPad.
- World lighting controls in the desktop app.
August
2026
Early days of the city compiler
- An early version of the compiler turned a second city region into streets, building footprints and roofs in the desktop app.
- Pontypridd's roads recompiled from the same graph as the rest of the town.
Buildings for whole cities
- City-wide building packages in a new compact format with a strict loader.
- Pontypridd's chimneys and dormers measured from elevation data.
- Large scenes split across multiple mesh-shader draws.
Path checks with evidence
- A Pontypridd path check for 718 premises from two candidate mast sites.
- Evidence export: CSV verdicts, a PDF report and the files behind them.
Kerbs, markings and shopfronts
- Bristol's kerb network, projected road markings and textured road surfaces.
- A masonry bond generator and a near-field facade library for shopfronts.
Ground and trees
- Tree canopy from LiDAR, a ground material library, textured terrain and instanced trees.
- Bristol's turn restrictions imported into the road network.
Travel demand and live feeds
- A travel demand pipeline, from public trip data to a compiled trip table estimated against counts.
- Live feeds bound to the network: TomTom flow, VivaCity counts and ANPR journey times, with a first live replay.
- DfT Street Manager roadworks received by a live endpoint, with a closure re-route demonstration.
July
2026
A DirectX 12 renderer
- A new DirectX 12 core with a render graph and offline shader tooling.
- GPU-driven physically based rendering, tested with 10,000 vehicles.
- The full Bristol scene rendered and benchmarked, then the desktop moved to a native Windows (WinUI 3) app.
- A street map linked to the 3D view.
Real elevation v4.0.0
- Environment Agency LiDAR at 1 m resolution as the ground source.
- Bridges, decks and portals solved in three dimensions.
- Terrain, embankments and water that follow the measured landform.
Linked 2D and 3D
- A 3D command view of Bristol with building massing.
- A split view where the 2D map and 3D scene always agree.
- A workstation layout for analysts.
Research release and roundabouts v3.0.2
- An internal research prerelease of the engine.
- Roundabout behaviour extracted from recorded driving (rounD), held behind a pre-registered validation ladder.
Replay Deck and junction behaviour
- A Replay Deck to scrub, select, fork and compare runs.
- Standing queues, per-approach signals, box junctions and pedestrian stages.
- Give-way behaviour at unsignalised GB junctions.
The first 3D world
- A chunked city pipeline for Totterdown, Bristol, locked to LiDAR terrain.
- Buildings with level floors, terrace roofs and chimneys.
June
2026
Georeferenced exports and fidelity research
- OpenDRIVE export placed on real-world coordinates.
- Occlusion experiments comparing simple and detailed geometry at a Bristol junction.
Hazard Calculus v3.0.0
- From what a driver cannot see to a minimum-risk speed, including degraded traction.
- Gap acceptance calibrated on recorded intersection driving (inD) and validated at held-out locations.
Behaviour learned from real driving v2.0.0
- A human gap-acceptance kernel fitted from recorded roundabout driving (openDD).
- Traffic signals and a map-style visualiser for Bristol.
- Windows release packaging.
An event-driven city engine
- Free flow, car following and right of way as events, matching the reference engine on 12 of 12 cases.
- A deterministic city-scale run and a throughput benchmark on modest hardware.
- A directed multimodal GB road network.
The scenario machine
- A standards-compatible OpenDRIVE junction export.
- Scenarios with exact replay, a failure ledger and an edge-case finder.
May
2026
Road markings by country
- Country-aware road marking profiles for OpenDRIVE, with a validator.
The first release v1.0.0
- A deterministic traffic engine and an OpenDRIVE exporter.
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