The process of opening a 3D model in Revit generally involves importing or linking the model. The exact method depends on the file type and your intended use of the model within Revit.
Here's a breakdown of the common methods:
1. Importing a 3D Model:
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This method embeds the 3D model directly into your Revit project.
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Use this when you need to modify the geometry directly within Revit, but be aware that importing can significantly increase your file size.
- Go to the "Insert" tab.
- Click "Import CAD." (For file types like .dwg, .dxf, .sat)
- Click "Import 3D" (For file types like .3dm).
- Navigate to the 3D model file on your computer.
- Select the file.
- Configure the import settings (e.g., import units, positioning). These settings are crucial for ensuring correct scale and placement of the model.
- Click "Open."
2. Linking a 3D Model:
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This method creates a link to the 3D model file, meaning the model is not embedded in your Revit project. Any changes to the original model file will be reflected in your Revit project when you reload the link.
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Use this when the 3D model is large or frequently updated, and you don't need to directly edit it within Revit.
- Go to the "Insert" tab.
- Click "Link CAD." (For file types like .dwg, .dxf, .sat)
- Navigate to the 3D model file on your computer.
- Select the file.
- Configure the link settings (e.g., positioning, import units). Pay close attention to positioning to ensure the linked model aligns correctly with your Revit project.
- Click "Open."
File Types Commonly Used:
Revit supports various 3D model file formats, including:
- DWG: A common CAD format from AutoCAD.
- DXF: Another CAD format suitable for data exchange.
- SAT: A standard ACIS (geometric modeling kernel) format.
- 3DM: The file format for Rhinoceros 3D models.
Important Considerations:
- File Size: Importing larger models can slow down Revit's performance. Linking is often preferable for large files.
- Level of Detail (LOD): Simplify complex models before importing or linking to improve performance.
- Origin and Units: Ensure the origin and units of the 3D model are compatible with your Revit project to avoid scaling or positioning issues.
- Visibility/Graphics Overrides: Linked or imported models can have their visibility controlled independently within Revit views.
- Family Creation: For greater control and parametric capabilities, consider importing the 3D model into a Revit family. As mentioned in the reference YouTube video, doing so allows for further adjustments and translation of the imported geometry into Revit objects.
In summary, opening a 3D model in Revit involves either importing or linking the file, depending on the file type, size, and intended use. Properly configuring import/link settings is crucial for a seamless integration into your Revit project.
