Run the Mesh Import add-in in Revit.

Select an OBJ file.

Set options -- scale, Category, Material, and orientation.

Categories available are Casework, Entourage, Furniture, Generic Models, Lighting Fixtures, Mass, Mechanical Equipment, Planting, Roads, Site, and Structural Framing.

Pick a point on the current work plane for insertion

The import may be moved and rotated as needed. It will take on the appearance of its Category & Material. It can also be rendered the same as other elements in Revit. To re-scale, simply undo or delete, then re-import using a different scale in the app's dialog box. The new shape may be copied freely in the project. The shapes can be put into Families, too.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10) and uninstall as you would any other application from your system.

See https://truevis.com/revit-mesh-import for app details and to give feedback.

See https://revthat.com/preparing-meshes-for-import-to-revit-as-directshape for advice on preparing meshes for import into Revit.

See  https://truevis.com/troubleshoot-revit-mesh-import for info about troubleshooting the app and the OBJ data to be imported.

See https://revthat.com/comparing-obj-import-revit-2022-addin-vs-native-import -- a comparison of this app with native OBJ importing in Revit.

Any refunds will be minus PayPal fees, generally 2.9% + $0.30.

• For the English language Revit
• There is some size limit for the mesh -- about 150000 faces. It can be worked around by simplifying one’s mesh, etc.
• Meshes should be manifold -- one continuous surface.
• Some aspects of the OBJ format such as smoothing are not imported. This can be worked around by editing and exporting from mesh software like MeshLab
• Groups defined in the OBJ are imported as separate shapes
• Some meshes or data in OBJ files may be incompatible with Mesh Import
• Resultant shapes can neither be mirrored nor scaled in Revit