Fireplace

Note: Size: 1.6 m wide (chimney breast), 2.4 m tall to the cornice top (matching the kit's bookshelf walls), 0.86 m deep including the stone hearth; the mantel shelf top is at 1.21 m. Origin: bottom centre of the back face (x = 0, z = 0, floor level), so the piece sits flush against a room wall; the front faces +Z and the model rests on y = 0. The back is one plain mahogany-dark face meant to go against a wall. The GLB has 1,592 triangles in 30 meshes, is static and carries no animation clip; three-check's 1,858-triangle figure also counts the viewer's staging ground, which is not exported. Each part is a group holding one mesh per palette colour (e.g. mantel.mahogany_light). Every material is named exactly after a kit palette colour, and names repeat because the exporter clones materials per mesh. The flames are static faceted brass and parchment cones, not an animated or emissive effect. Params are baked into the GLB at their defaults and only change the model when the scene is rebuilt in the viewer. bookColours (the kit's 'Book colours') sets the share of mantel book spines drawn from the bright kit colours instead of leather tones: 0 gives all leather browns and black, 1 gives about 60 % bright. The layout uses a fixed seed. width (1.4–2.0 m) widens the chimney breast, cornice and hearth around a fixed-size opening and mantel. mantelBooks stops adding books once the row reaches the clock, so on the default shelf about 10–11 is the visible maximum. fire 0 removes the flames and leaves the logs. The max extreme (width 2.0, 14 books, colours 1, lit) and the min extreme (width 1.4, no books, colours 0, unlit) both passed three-check, at 1,906 and 1,646 triangles including the staging ground. glb-lint: 0 errors and 6 heuristic warnings, covering material count and exporter duplicates, non-indexed geometry (deliberate flat shading), overlapping sibling meshes (one per colour inside the same part), the picture light reported as detached (its bracket meets the breast in another part), and a 2.4 m height against the direction's 1 m reference. Its verdict reads UNVERIFIED only because no requirements contract was supplied. plan-check rejects only the hyphenated library part ids, because its regex allows no hyphen; the same plan with the slug de-hyphenated passes. three-check and the GLB reload keep all 12 planned ids. Fix rounds: (1) replaced a bright green overmantel panel that read as a screen with three raised mahogany panels, and loosened the hero framing; (2) rebuilt the chimney breast as one back slab to remove a seam on the back; (3) moved the cornice band off the back face to stop z-fighting.