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Modeling > Creating Surfaces > Creating Extrusion surfaces

Creating extrusion surfaces


Extrusion pushes a 2D curve along an axis to create a 3D Surface.

The axis is a line coming out of the viewport in which you draw the curve. For example, if you draw a curve in top view and extrude it, it is extruded along the Y axis.


To create a surface by extrusion:
  1. Draw a curve. See Drawing a freeform curve .
  2. Adjust the curve keeping the following in mind:
  3. With the curve selected, choose Modeling > Create Surface > Extrusion from Curve.
  4. An extrusion surface appears in the viewports and the World Explorer.

  5. Select the extrusion and translate, scale, or rotate it as needed.
  6. To change its shape, modify its contour curve. See Modifying Curves .
  7. In the Parameter Editor, adjust the extrusion parameters.

Extrusion Parameters

Roll angle (start/end)

Creates a twisting extrusion. The first value is the start angle (in degrees) and the second, the end angle. The following illustration has a start of 0 and an end of 90 degrees. This could be useful for modeling an ice cream cone or a woodscrew.

Scaling
(start/ end)

Tapers the extrusion. The first value is the start scale (ranging from 0 to 1) and the second the end scale. The following illustration has a start of 1 and an end of 0.25

Subdivisions

Number of subdivisions along the length of the extrusion. The default value is 1. If you intend to bend, push, or skin the surface, you should increase the number of subdivisions.

Length

Length of the extrusion. The default length is 1 unit.

Top capping

Closes the top of the extrusion.

End capping

Closes the bottom of the extrusion.


See also:

Surface parameters

Modifying surfaces

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