Extrude

An extrude surface is extruded from a curve sub-object. It is similar to a surface created with the Extrude modifier. The advantage is that an extrude sub-object is part of the NURBS model, so you can use it to construct other curve and surface sub-objects.

Surface extruded from a curve

Reference

When you turn on the Extrude button, or while an extrude sub-object is selected, a rollout with the extrusion parameters appears.

Amount: The distance the surface is extruded from the parent curve, in current 3DS MAX units.

Direction: Click X, Y, or Z to choose the axis of extrusion. Default = Z.

How To

To create an extrude surface:

1. In a NURBS object that contains at least one curve, turn on Extrude.
2. Move the cursor over the curve to extrude, and drag to set the initial amount.

By default, the surface extrudes along the NURBS model’s local Z axis. A gizmo (yellow by default) indicates the direction of extrusiontransforming the extrude surface’s gizmo changes the direction of the extrude, letting you extrude along an axis that isn’t aligned with a local coordinate axis.

3. Adjust the extrusion parameters.