{"data":{"id":"22873","slug":"modular-greybox-architecture-kit-stair-spiral-segment-aa7db880","title":"Greybox spiral stair half-turn segment (Modular Greybox Architecture Kit)","summary":"A stackable spiral stair segment: twelve wedge winders sweeping 180 degrees around a 0.24 m column, climbing 1.5 m, with balusters and a helical outer handrail.","description":"A stackable spiral stair segment: twelve wedge winders sweeping 180 degrees around a 0.24 m column, climbing 1.5 m, with balusters and a helical outer handrail. Dimensions 2.70 x 2.55 x 1.69 m (X x Y x Z). Origin on the column axis at the lower deck datum; the first winder starts on the +X axis and the sweep runs toward +Z. Metres, +Y up, +Z front, ground contact at y=0. Stack segments 1.5 m apart, rotating each by 180 degrees, to build a continuous spiral through any storey height. Connectors: bottom (run-end), top (run-end). Neutral greybox palette for prototyping before art exists. Static geometry; no skinned rig, collision or navigation data.","status":"published","url":"https://3dassets.dev/assets/modular-greybox-architecture-kit-stair-spiral-segment-aa7db880","cdnUrl":"https://cdn.3dassets.dev/assets/22873/v1/model.glb","downloadUrl":"https://3dassets.dev/download/modular-greybox-architecture-kit-stair-spiral-segment-aa7db880","thumbnailUrl":"https://cdn.3dassets.dev/assets/22873/v1/thumb.webp","posterUrl":"https://cdn.3dassets.dev/assets/22873/v1/poster.webp","blurhash":"U8A^RUt700M_x]-;IUD$00IV~q%Mt7M{WBxu","category":{"slug":"buildings","title":"Buildings & Architecture"},"tags":[{"slug":"modern","title":"Modern"},{"slug":"low-poly","title":"Low Poly"},{"slug":"kit","title":"Kit / Set"},{"slug":"modular","title":"Modular"}],"license":{"slug":"cc0-1.0","name":"CC0 1.0 Universal","url":"https://creativecommons.org/publicdomain/zero/1.0/","attributionRequired":false},"contributor":{"username":"3dassets","name":"3D Assets","url":"https://3dassets.dev/u/3dassets"},"stats":{"fileSize":55584,"triangles":1104,"vertices":3312,"meshes":3,"materials":3,"textures":0,"animations":[],"boundingBox":{"min":[-1.3497300148010254,-0.000010987978335263993,-0.3400000035762787],"max":[1.350000023841858,2.549999952316284,1.3500355112526083]},"sizeMeters":[2.7,2.55,1.69],"hasDraco":false,"hasMeshopt":false,"hasKTX2":false,"extensionsUsed":["KHR_mesh_quantization"]},"aiGenerated":true,"aiModel":"Claude Fable 5.1","downloads":0,"publishedAt":"2026-09-07T20:02:23.401Z","updatedAt":"2026-09-07T20:02:23.496Z","usage":{"threejs":"import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js'\n\nconst loader = new GLTFLoader()\nloader.load('https://cdn.3dassets.dev/assets/22873/v1/model.glb', (gltf) => {\n  scene.add(gltf.scene)\n})","r3f":"import { useGLTF } from '@react-three/drei'\n\nexport function GreyboxSpiralStairHalfTurnSegmentModularGreyboxArchitectureKit(props) {\n  const { scene } = useGLTF('https://cdn.3dassets.dev/assets/22873/v1/model.glb')\n  return <primitive object={scene} {...props} />\n}\nuseGLTF.preload('https://cdn.3dassets.dev/assets/22873/v1/model.glb')","modelViewer":"<model-viewer src=\"https://cdn.3dassets.dev/assets/22873/v1/model.glb\" alt=\"Greybox spiral stair half-turn segment (Modular Greybox Architecture Kit)\" camera-controls auto-rotate></model-viewer>","blender":"# Blender 4.x: File > Import > glTF 2.0, or from the Python console after downloading the file.\nimport bpy\nbpy.ops.import_scene.gltf(filepath='model.glb')  # from https://cdn.3dassets.dev/assets/22873/v1/model.glb\n# Metres and +Y up are converted to Blender's Z-up scene automatically.","godot":"# Godot 4: copy model.glb into res://models/ and the editor imports it as a scene.\nvar packed := load(\"res://models/model.glb\") as PackedScene\nvar model := packed.instantiate()\nadd_child(model)","unity":"// Unity: import model.glb with glTFast (Package Manager: com.unity.cloud.gltfast) and drag the prefab in,\n// or load it at runtime straight from the CDN:\nusing GLTFast;\nvar gltf = new GltfImport();\nif (await gltf.Load(\"https://cdn.3dassets.dev/assets/22873/v1/model.glb\")) await gltf.InstantiateMainSceneAsync(transform);"}}}