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CAD tip CAD tip # 6541:

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Q - question

How to convert 2D SOLID objects to 3D faces?

A - answer If you need to (e.g. for rendering) convert 2D objects of the type SOLID to 3D faces, use an intermediate conversion to REGION or a conversion to Surfaces.

The REGION command can convert Solids to Regions - then you can explode them or use them for modeling.

But you can also directly use the CONVTOSURFACE command and get the entity of the type Surface (PLANESURFACE). You can render it directly or use the THICKEN command to assign it a minimal thickness making it a 3D Solid body (3DSOLID).

To directly convert 2D Solids to 3D Faces or PFaces you can use the CADstudio Sol2Face utility - see Download

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See also:
Tip 13847:Pringles in AutoCAD - a hyperbolic paraboloid.
Tip 11072:How to make an interference line from 3D Faces?
Tip 11054:Difference volume (3D solid) between two TIN surfaces (sets of coordinates)
Tip 9357:Intersection of a 3D curve with a 3D surface in AutoCAD.
Tip 8318:How to convert a 3DSolid to 3DMesh or 3DFaces?

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