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CAD tip # 6710:

Question CAD
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How to smooth a surface defined by individual 3DFaces?

You can smooth a surface defined by a group of 3D faces (3DFACE objects) but you have to convert it first to a 3D mesh.

If you get a series of 3D faces (terrain generator, import from another 3D software, et.c), you can convert it to a single "3D mesh" object in AutoCAD 2010. Then you can manipulate it, smooth it and interactively edit its 3D shape.

First convert the selected 3D faces to individual surfaces - the CONVTOSURFACE command
Then use the UNION command to join the surfaces together
To retain the shape of the original faces, set the FACETERSMOOTHLEV variable to 0 (or perform this setting through the MESHOPTIONS command)
And finally convert the unified surface to a 3D mesh object with the MESHSMOOTH command

Terrain-Mesh

See also the sample CAD video #74 (shot in the Czech version of AutoCAD 2010)

ACAD2010ADT2010Civil2010

* CAD

28.5.2009 17930×

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applies to: AutoCAD 2010 · AutoCAD Architecture 2010 · Civil 3D 2010 ·

See also:
Tip 12237:	UnfoldRS - unfold 3D surfaces to 2D in AutoCAD.
Tip 12064:	3D offset of a surface.
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 9711:	3DConstruct - converting a 3D mesh to a frame construct

Selected tip: Arithmetic expressions in AutoCAD dynamic input fields.

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