I Was Here – Draw on street panoramas, others can find your drawings
Draw on street panoramas and others find your marks—genuinely new collaborative canvas.

3D stroke projection on panoramas beats flat overlays — global canvas nobody's built before.
Digital artists, street art enthusiasts, WebGL developers
Google Street View · Mapillary
Strokes get projected onto the 3D panorama so they wrap around buildings and follow the geometry, not just a flat overlay. Uses WebGL2 for rendering, Mapillary for the street imagery.
The idea is for it to become a global canvas, anyone can leave a mark anywhere and others stumble onto it.
Link is https://washere.live
Draw on street panoramas and others find your marks—genuinely new collaborative canvas.
3D stroke projection onto panorama geometry beats flat 2D overlays.
Persistent WebStreams replay drawings from JSON lines—novel infra for streaming apps.
Single-stroke oscilloscope rendering of Bad Apple is technically clever but novelty-only.
The standout is the real-time feedback loop: Pencil input feeds sub-second inference over WebSockets so your composition evolves as you draw, not after the fact. UX tools like influence sliders, pause, seed shuffle and one-tap enhancers (2x upscaling, background removal) give artists control instead of handing everything to the model — clever engineering that still leaves open questions about on-device vs cloud inference and latency/cost tradeoffs.
RDF export for diagrams.net when semantic web tooling already exists elsewhere.