Rebuilt tideglass ruin portal: true fitted elliptic arch, keystone, paired fluted columns, bronze mouldings, fractured mossy bases and hollow barnacle colonies; 7.40 × 2.60 × 6.80 m.
Triangles: 117,436; four merged static mesh nodes; GLB 10.03 MiB; metres, Y-up, front +Z, ground-centred origin.
Materials: translucent tideglass, verdigris bronze, mossy limestone, calcareous shells; all colour, tangent normal and ORM results baked with Cycles on the asset.
Textures: tideglass/stone 2048²; bronze/shell 1024²; base colour JPEG, tangent normal JPEG, packed occlusion-roughness-metallic JPEG.
Poly Haven CC0: marble_rock_01, rock_pitted_mossy, green_metal_rust (https://polyhaven.com/license); 1k registered diff/nor_gl/arm inputs.
Differences: deliberately replaces the rejected broken pillar lintel with a complete structural arch; damage and marine growth are authored interpretations rather than exact copies of the illustration.