Squashed from work; the fine-grained history is under tag archive/work-2026-08-26:
- render+sim: the two hooks the model viewer already relies on
- viewport: Realtime gets the engine's cascaded shadow pass, the NOAA sun, metered exposure with sky ambient, a haze knob, a time-of-day slider in the header, and no grid — the building itself still waits for its casters and direct light
- render: the engine's receiver shader takes the sun with two-sided normals and the shadow term for the model batches
- fab: a 3D creation shell and the viewer built on it
- render: two shaders that never compiled — a let is not assignable, a var is
- sim: a declared map facing becomes a body's heading through one rule
- render: a HUD that already reads as a game's before anyone styles it
- asset+sim: the two modules their own commits already declared
libs/render picks up the two biggest new modules in the group: `level.rs`
(the imported-world runtime) and `player_nav.rs` (walkable-surface planning
with clearance bands). The renderer, shader set, GPU lightmap and skinning
paths all grow with them — a chart-edge texel is no longer trusted with a
skirt's light, a lamp only receives what the sky is not already delivering,
and lamp photometry comes from the fixture rather than the mesh scale. A
`walk_probe` example drives the navigation directly.
xr gets splat packing and a GPU splat sort (`splat_pack.rs`, `splat_sort.rs`,
with tests), and view_splat is largely rewritten on top of them.
remesh, xatlas, gltf, splat and sim carry the supporting work: the xatlas
unwrap hang is fixed and the pass is several times faster, the glTF writer
emits the rig and vehicle contracts, and sim grows the entity layer the
imported worlds drive.
Drop the archived old/ tree, root AI notes, splashgame.md (Arcade lives
in the private sandbox), widgets-dll leftovers, and LAN/oracle helper
scripts. Move download_*.sh into tools/, and move sim/math out of
libs/game/ so the public repo no longer has a game/ directory.
Also quiet first-party compile noise and skip asset-ui tests that need
sandbox kits or uncommitted fixtures.
