Convert Polyface Mesh to Solid in AutoCAD

Convert Polyface Mesh to Solid in AutoCAD

Converting Polyface Meshes to Solids: A Vital Step in AutoCAD

AutoCAD is a powerful DWG editor that allows you to create and edit 3D models. One of the features of AutoCAD is the ability to import and export different file formats, such as DWG, DXF, STL, or SAT. However, some of these formats may not be compatible with the solid modeling tools in AutoCAD. For example, if you import a polyface mesh file, you may not be able to perform common operations on solids, such as extrude, revolve, or sweep. In this case, you need to convert the polyface mesh to a solid entity first.


There are two native ways to convert a polyface mesh to a solid entity in AutoCAD. The first method is based on the CONVTOSOLID command. The second method uses the MESHSMOOTH native AutoCAD command. The CONVTOSOLID command converts a polyface mesh to a 3D solid entity by filling the gaps between the faces. The MESHSMOOTH command converts a mesh object to a smooth surface by subdividing the faces and smoothing the connecting edges. Both commands can be accessed from the modify panel in the main ribbon bar.

Beyond CONVTOSOLID: Automesher Application

Another way to convert a polyface mesh to a solid object in AutoCAD is to use Automesher Application. Automesher is an add-on for AutoCAD that extends its capabilities for importing and exporting 3D files and converting DWG drawing entities. With Automesher, you can work with various 3D file formats that are not supported by vanilla AutoCAD, such as SKP, STEP, FBX, OBJ, DAE, 3DM, and more. Automesher application also enables you to convert 3D drawing entities, such as polyface mesh, polygon mesh, or 3D faces to solid objects.

Mesh to Solid: Conclusion

The main advantage of Automesher Application over the native AutoCAD methods is its success ratio. It can still convert polyface meshes that have non-manifold geometry, or other errors, into valid solids, while the CONVTOSOLID command would just fail. If you have to work with legacy polyface meshes or polygon meshes in DWG drawings, then Automesher application is a must-have tool for your AutoCAD, BricsCAD, or ZWCAD DWG editor.