**Generating Objects from Curves**

You can create surfaces and polygon meshes from curves in several ways.

**Topics**

• Using Birail

Extrude an open curve along two guides.

• Using Curve Net

Pick a series of curves in U and V.

• Extruding Curves along Curves

• Extruding with Two Profiles

Extrude with two profiles, morphing one into the other as it runs along a rail curve.

• Picking Boundaries Using Four-Sided

Pick four curves to use as boundaries.

• Lofting Curves

Make a shell from a series of profile curves.

• Revolving Curves around Axes

• Revolving Curves Around Curves

**Related Information**

For information about creating curves to work from, see Curves [Surface and Curve Modeling].

For information about how you can modify the generated polygon meshes and surfaces further, see Deformations, as well as Modeling Polygons & Polygon Meshes [Polygon Modeling] and Surfaces [Surface and Curve Modeling],

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