nodes: let hosts set the wall materials resolver

[atyrode]

WallCutout already accepts a materialResolver, but WallSystems hard-wires getCurtainAwareWallMaterials, so a host cannot restyle cut-away walls without forking the wall kind (plugins cannot re-register wall).

This adds setWallMaterialsResolver(resolver | null), read by WallSystems through useSyncExternalStore (null restores the default), and exports getCurtainAwareWallMaterials so a host can wrap the default and replace one variant — for example a low stub in place of the translucent film for cut walls.

No behaviour change by default.

• bun run check-types --filter=@pascal-app/nodes: passes
• Biome on the three files: clean

---

Note

Low Risk
Opt-in API with the same default resolver; only affects wall cutaway material styling when hosts override it.

Overview
Hosts can now customize how WallCutout picks wall materials (visible, cut-away, translucent, delete) without replacing the built-in wall kind.

A new module holds a module-level resolver defaulting to getCurtainAwareWallMaterials. setWallMaterialsResolver(resolver | null) swaps it and notifies subscribers; null restores the default. getCurtainAwareWallMaterials is exported from @pascal-app/nodes so hosts can wrap the default and tweak one variant (e.g. cut-away styling).

WallSystems reads the active resolver via useSyncExternalStore and passes it into WallCutout instead of hard-wiring the curtain-aware helper. Default behavior is unchanged until a host calls the setter.

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[cursor]

Resolver updates skip batched walls

Medium Severity

setWallMaterialsResolver refreshes WallCutout through useSyncExternalStore, but WallBatchSystem still keys appearance only on shading, textures, theme, and scene materials. After a floor is sewn, a host swap that changes opaque visible materials leaves the merged meshes on the old set while the per-wall meshes stay hidden.

Additional Locations (1)

• packages/nodes/src/wall/materials-resolver.ts#L12-L16

 

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