Exporting your 3D models from AutoCAD to the OBJ format is a straightforward process, primarily used for transferring models to other 3D software for rendering, animation, or further editing.
To export your drawing from AutoCAD to an OBJ file, follow these simple steps:
Steps to Export AutoCAD to OBJ
The direct path to export using the built-in functionality is quick and efficient.
- Navigate to the File tab in the AutoCAD ribbon menu.
- Click on Export.
- From the export options, select CAD Formats.
- Choose OBJ from the list of available formats.
- In the OBJ Export dialog that appears, you can specify settings relevant to your export. These settings might include options for how meshes are generated or how materials are handled.
- Click Save to create your OBJ file in the specified location.
- Alternatively, click Cancel to close the dialog without exporting.
- File > Export > CAD Formats > OBJ
This sequence of actions initiates the export process, preparing your 3D model for use in applications that support the universal OBJ format.
Understanding the OBJ Format
The OBJ file format (.obj) is a widely accepted standard for 3D geometry. It's commonly used for exchanging 3D models between different software applications. An OBJ file typically stores:
- Geometry: Vertices, faces, texture coordinates, normals, etc.
- Material Information: Usually linked to an accompanying MTL file (.mtl) that describes surface properties like color, texture, and transparency.
Exporting to OBJ is useful when moving your model to software like Blender, 3ds Max, Maya, rendering engines, or 3D printing slicers (though STL is more common for pure printing geometry).
Practical Considerations for OBJ Export
When exporting complex models, keep the following in mind:
- Complexity: Highly detailed models can result in large OBJ files and long export times.
- Materials and Textures: Ensure your materials are set up correctly in AutoCAD, and check the export options for how materials are handled and linked via the MTL file.
- Units: Verify that the units in your AutoCAD drawing are appropriate for the target software.
- Model Preparation: Clean up your model, remove unnecessary objects, and ensure your 3D solids or meshes are valid before exporting for the best results.
Using the built-in export function explained above is the standard and recommended method for getting your AutoCAD 3D models into the versatile OBJ format.
