Length

Distance to extrude in SOFTIMAGE units.

If you are defining shapes in local shape mode, it is better to adjust this parameter than to translate the components interactively. Otherwise, you might not get the expected results as the local reference frame changes.

Duplicate Polygons

Controls how polygons are copied.

• If this option is off, polygons are extruded, that is, the copied polygons are connected to the original geometry.

• If this option is on, polygons are duplicated, that is, the copied polygons are disconnected from the original geometry.

This option applies only to polygons, not to edges or points.

Inset Amount

Shrinks the boundary of the new polygons by the specified amount in Softimage units. Negative values expand the boundary instead of shrinking it, and the resulting polygons will not overlap even when the extrusion length is 0.

You can achieve similar effects by scaling using the options on the Transform tab, but with insetting the new edges are always parallel to the originals. In addition, scaling does not always work well with concave polygons whose edges might self-intersect. Another difference is that the inset always applies to the entire extrusion, rather than being repeated per subdivision.

This option applies only to polygons, not to edges or points.

Inset Locked

Controls how the amount of insetting is specified. This option is not available when Length is 0.

• If this option is off, specify the amount of insetting as a length using Inset Amount.

• If this option is on, specify the amount of insetting as an angle using Angle.

This option applies only to polygons, not to edges or points.

Angle

The amount of insetting specified as an angular difference from the normal in degrees. This option is available only when Inset Locked is on, and it applies only to polygons, not to edges or points.

X, Y, Z

Axis along which to extrude. When multiple options are on, the extrusion is performed around the corresponding unit vector. For example, if both X and Y are on, the extrusion is performed around the vector [ 1, 1, 0].

Frame

The coordinate space of the selected axes:

• Object uses the center of the polygon mesh object.

• Component uses the local cluster reference frame of the selected components. Non-adjacent components use separate reference frames.

Merge

When on, adjacent polygons are extruded together as a unit. When off, adjacent polygons are extruded separately, separated by polygons.

Maintain Orthogonality

Ensures that the Y axis of the reference frame is orthogonal to the selected components even when the object has been scaled non-uniformly. Only the existing transformations when the extrusion is applied are considered; if the object is animated or transformed later, the new values are not considered. This option is available only when Frame is set to Component.

Skirting Ratio

When extruding edges and points, controls the width at the base. Lower values produce sharper spikes and creases. With multiple Subdivs, this parameter controls the curvature of the extrusion profile.

Subdivs

Number of subdivisions along the axis of extrusion.

Transform Per Subdivision

Repeats the transformations iteratively at each subdivision. This option has an effect only when Subdivs on the Extrude page is greater than 0. When this option is off, the transformation is applied to the extrusion as a whole.