Converts 3D meshes and polylines and circles with thickness to 3D solids.

Access Methods


 Ribbon:  Home tabSolid Editing panelConvert to SolidNot available on the ribbon in the current workspace
 Menu: Modify3D OperationsConvert to SolidNot available in menus in the current workspace
 Command entry: convtosolid


Take advantage of the solid modeling capabilities available for 3D solids. When you convert mesh, you can specify whether the converted objects are smoothed or faceted, and whether the faces are merged.

The smoothness and number of faces of the resulting 3D solid are controlled by the SMOOTHMESHCONVERT system variable. Whereas the previous example shows a conversion to a smooth, optimized 3D solid, the following example shows a conversion to a faceted 3D solid in which the faces are not merged, or optimized.

The following tables list the objects that can be converted to solid objects and some limitations on their conversion.

Objects that Can Be Converted to 3D Solids

Object Required properties
Mesh Encloses a volume with no gaps between edges (watertight)
Polyline Closed, uniform-width, with thickness
Polyline Closed, zero-width, with thickness
Surface Encloses a volume with no gaps between edges (such as a revolved surface that is capped at both ends or closed mesh objects that were converted to surfaces)

Limitations on Conversion to Solid Objects

Object Description
Polyline Cannot contain zero-width vertices.
Polyline Cannot contain segments of variable width.
Separate objects that simulate a closed surface Cannot be a planar surface with contiguous edges or an exploded 3D solid box into six regions. However, you cannot convert those separate objects back to a solid with CONVTOSOLID.
Planar surfaces with contiguous edges Cannot convert separate objects, even if they enclose a volume without gaps.
Exploded 3D solid Cannot convert separate objects (in this case, regions).

You can select the objects to convert before you start the command.

The DELOBJ system variable controls whether the geometry used to create 3D objects is automatically deleted when the new object is created or whether you are prompted to delete the objects.

List of Prompts

The following prompt is displayed.

Select objects

Specifies one or more objects to convert to 3D solid objects. You can select objects with thickness or mesh objects.

If one or more objects in the selection set are invalid for the command, you will be prompted again to select objects.