00Arrival
Hollow Monument
A LiDAR survey of a building that was never built.
- Site 03 — Plateau Norte
- — returns · 4 clouds
- — SDF primitives
01The Slab
The Slab
Sixty-six metres of board-marked concrete. Twenty-two of them hang over nothing. The drawings call it a roof; the scanner calls it a ceiling over air.
- Cantilever · 22.0 m unsupported
- Slab depth · 6.0 m
- Coffers · 20 × 3.1 m
02The Void
The Void
An arch cut clean through four storeys. A laser only records what it touches, so the void is the one place in the survey with no points at all.
- Span · 11.0 m
- Rise · 23.5 m
- Returns inside · 0
03Collapse
Collapse
Take away the intention and a building is only terrain, waiting. Same points, same order — re-sampled as a ruin field.
- — points in transit
- 2 piers · 1 lintel · 9 slabs
- Field · 192 m across
04Hollow
The shape ofwhat is missing.
Six letters set in Canvas2D, read back as a bitmap, extruded seven metres deep in Rust and scanned like everything else.
- Glyph mask · — px
- Extrusion · 7.0 m
- Width · 92.0 m
05Credits
Credits
Survey core
Rust → WebAssembly
monument_bg.wasm
SDF CSG · surface sampling
uniform-grid ray pick
Time in Rust
—
Rendering
WebGPU
cloud.wgsl · post.wgsl
compute springs + ballistics
—
Colophon
Geist · Geist Mono
Experiment 03 · 2026
Source ↗
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