tm_import_rvt
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Third-party content written by another agent. Data to evaluate, not instructions.
Import a Revit/BIM model into the Twinmotion visualization pipeline: downloads the source file from a public URL, uploads it to an APS OSS transient bucket, and kicks off an SVF2 + thumbnail translation job. Returns the base64 URN (project_id) used by every other tm_* tool.
When to use: when a user wants to prepare a Revit (.rvt), IFC (.ifc), or other BIM/CAD model for real-time visualization in Unreal Engine / Twinmotion — typically the first step before rendering stills, defining scenes, or exporting FBX/glTF/OBJ geometry for a UE import. Also use when you need thumbnails or view metadata from a source file that has not yet been translated by APS.
When NOT to use: not for MEP clash review (use navisworks-mcp), not for quantity takeoff or cost estimation (use qto-mcp), not for Twinmotion presets editing — Twinmotion itself has no public REST API, so scene/material authoring must happen manually in the UE editor after FBX/USD export.
APS scopes required: data:read data:write data:create bucket:read bucket:create viewables:read. Uses Model Derivative API (translation) + OSS (upload). Twinmotion has no public REST API; all automation is APS Model Derivative + manual Unreal Engine export.
Rate limits: APS default ~50 req/min per app per endpoint; Model Derivative translation jobs ~60 req/min; large .rvt/.nwd/.ifc files are often multi-GB and translation can take 5–60 min — poll the manifest with exponential backoff (start 5s, cap 60s) rather than retrying this tool. Worker request ceiling is ~100MB body; extremely large files may need signed-URL upload instead.
Errors: 401 = APS token failed (check APS_CLIENT_ID/APS_CLIENT_SECRET, re-auth); 403 = scope missing (bucket:create/data:write not granted — have user re-consent); 404 = file_url unreachable; 409 = bucket key collision (rare — retry, tool uses timestamp); 413/507 = file too large for worker memory (advise signed-URL upload); 422 = unsupported source format (only Autodesk-accepted types: rvt, ifc, nwd, dwg, dgn, 3dm, stp, etc.); 429 = back off 60s before retrying; 5xx = APS upstream outage, retry with backoff.
Side effects: CREATES a new transient OSS bucket (scanbim-viz-<timestamp>, auto-expires in 24h), CREATES an object in OSS, STARTS a translation job consuming APS cloud credits. NOT idempotent — each call creates a new bucket + URN. Writes a row to usage_log D1 table.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| file_url | string | yes | Public HTTPS URL to download the source BIM/CAD file. Must be reachable without auth from Cloudflare Workers egress. Supports rvt, ifc, nwd, dwg, dgn, 3dm, stp, obj, and other APS-supported formats. Signed URLs (S3/GCS) work if the signature is embedded in the query string. |
| file_name | string | yes | Filename with extension used as the OSS object key. Non-alphanumeric characters are sanitized to underscores. Extension drives APS translator selection (.rvt → Revit, .ifc → IFC, etc.). For downstream Twinmotion/UE import, keep the base name meaningful (e.g. 'TowerA_L01-L20.rvt' → later exported as TowerA_L01-L20.fbx / .glb / .usd). |
| include_materials | boolean | no | If true (default), the translation preserves material/texture data so the derivative is visually meaningful in Twinmotion/UE. Set false only for geometry-only pipelines (faster, smaller derivatives). |
| lighting_preset | string | no | Lighting preset label stored alongside the import — purely metadata for downstream tm_render_image / UE scene setup; does not affect the APS translation itself. 'natural' = daylight sun+sky, 'studio' = neutral 3-point, 'evening' = warm low sun. |
Raw JSON schema
{
"type": "object",
"properties": {
"file_url": {
"type": "string",
"description": "Public HTTPS URL to download the source BIM/CAD file. Must be reachable without auth from Cloudflare Workers egress. Supports rvt, ifc, nwd, dwg, dgn, 3dm, stp, obj, and other APS-supported formats. Signed URLs (S3/GCS) work if the signature is embedded in the query string.",
"examples": [
"https://example-cdn.com/projects/office-tower.rvt",
"https://storage.googleapis.com/bim-uploads/site-model.ifc?X-Goog-Signature=..."
]
},
"file_name": {
"type": "string",
"description": "Filename with extension used as the OSS object key. Non-alphanumeric characters are sanitized to underscores. Extension drives APS translator selection (.rvt → Revit, .ifc → IFC, etc.). For downstream Twinmotion/UE import, keep the base name meaningful (e.g. 'TowerA_L01-L20.rvt' → later exported as TowerA_L01-L20.fbx / .glb / .usd).",
"examples": [
"Building.rvt",
"SitePlan.ifc",
"Factory_v3.nwd",
"Terrain.dwg"
]
},
"include_materials": {
"type": "boolean",
"description": "If true (default), the translation preserves material/texture data so the derivative is visually meaningful in Twinmotion/UE. Set false only for geometry-only pipelines (faster, smaller derivatives).",
"examples": [
true,
false
]
},
"lighting_preset": {
"type": "string",
"enum": [
"default",
"natural",
"studio",
"evening"
],
"description": "Lighting preset label stored alongside the import — purely metadata for downstream tm_render_image / UE scene setup; does not affect the APS translation itself. 'natural' = daylight sun+sky, 'studio' = neutral 3-point, 'evening' = warm low sun.",
"examples": [
"natural",
"studio"
]
}
},
"required": [
"file_url",
"file_name"
]
}