Start: 2026-10-07 18:28 CEST. Checkpoint deadline: 21:28 CEST.
Scope: realistic tideglass gateway, true fitted arch replacing the rejected horizontal column.
Axes: Blender Z up / front -Y, exported glTF Y up / front +Z; metres; ground-centred origin.
Construction: two paired fluted jambs, continuous elliptic voussoir crown and keystone; profiled bronze bearings, eroded stone plinths, marine shell accretions.
Budget: 50–120k triangles, <=8 materials, images <=2048, GLB <=12 MB. Target 5 material draws after merging.
Cameras: 1920x1080 front three-quarter soft daylight; orthographic side; same-view clay; exported round-trip close/rear evidence.
Pipeline: clean single-script build, Cycles baked colour/normal/ORM, export, independent audit and image inspection. Maximum three visual revisions.