historic glass conservatory 3d model

Create a clean, game-ready, medium-density 3D architectural mesh from this reference. Grand Conservatory, a Victorian municipal winter garden in a fictional British estuary seaside town. Weathered painted iron frame, tall green-tinted glass, pale salt-stained stone, symmetrical civic entrance, shallow front steps, large central glass dome, modest side wings, roof ribs, upper gallery and rear service entrance. Preserve a believable building silhouette and proportions. Include clear doors, roof ridges, window ledges, balcony rails and service access suitable for a flying gull to perch on. Simple open interior shell only; no clutter. Clean UVs, PBR materials, collision-friendly geometry, GLB/glTF if available. No text, logos, people, random props, American architecture, palms or fantasy details.