Variable duplicateGeometriesConst

duplicateGeometries: inspect.sceneModel.Inspection = ...

Opt-in (InspectSceneModelParams.checkDuplicateGeometries). Detects byte-identical geometries by FNV-1a-hashing each geometry's typed-array attributes plus its primitive constant and AABB. Two geometries with the same fingerprint and lengths are byte-identical (or birthday-paradox-collide; for ≪ 10⁶ geometries the false-positive rate is negligible).

Each duplicate cluster emits one GEOMETRY_DUPLICATE warning, with context.duplicates listing the redundant ids and highlight.objectIds covering every owning SceneObject across the cluster.

mergeDuplicateGeometries consumes the issues — repoints every referencing mesh at the canonical id and destroys the duplicates.