The sample draws with the engine it advertises: the example room in WebGL2, with the 2D plan as its fallback #222

/example now draws its room, plate and tracers through the engine's WebGL2 renderer, out of recipes written in the sample itself: src/engine/example.ts gained two box meshes (the room is one box handed in with its corners swapped, so every face is wound to be seen from within), two atlas shaders, a two-instance scene with one line for the shot, and a spark on the world so a tracer fades in ticks the game owns. src/example/main.ts is still only wiring — it builds the renderer and falls back to plan.ts when createRenderer hands back null, exactly as the range does — and the readout (score, clock, bar, help, crosshair) moved onto the HUD canvas so both paths share one copy of it.

One engine change made it possible: RendererAssets.near and .far, the clip planes in the game's own unit, defaulting to the shooter's 6 and 12,000. A room four metres wide is entirely inside a near plane of six Source units, and a renderer that assumed one game's units was the engine knowing a game; renderer.test.ts holds the projection against both.

Sizes, measured on the bundles this branch commits: example 9,735 → 21,115 raw and 4,618 → 9,189 gzipped, so its ceiling moves to 23,500 / 10,200 with the reasoning written into src/games.ts. Almost none of that is the game — the recipes are about forty lines — it is renderer.ts, mesh.ts, texture.ts and scene.ts arriving whole, the same price the range paid. The other two bundles grew 46 and 34 raw bytes for the clip planes and fit their ceilings. Lines: src/engine/example.ts 79 → 176, the wiring 220 → 279, and /example's "What this cost" is re-rendered from those files rather than retyped — the page's own test still refuses any digit in that prose that is not a measurement.

Worth looking at: the GL path in src/example/boot.test.ts (the atlas and both meshes uploaded once, two drawElements a frame, a tracer that appears on a press and is gone a tenth of a second later), the fallback test beside it, and src/example/stage.test-helper.ts, whose GL recorder is a proxy rather than a third written-out copy of the renderer's call list. I did not give the example a column in the guide's seam table — that is #130's job, and the sentence there now says so instead of claiming the example is in no column. One thing outside the issue: main had two committed app.<hash>.js bundles, which twelve tests refuse to pick between, so the first commit on this branch rebuilds and commits one.

🤖 Generated with Claude Code

Closes #216