CATIA V5 import options (Windows only)

Keep Topology: If this option is checked, CATIA skins are converted to Alias shells. Otherwise, they are converted to a collection of trimmed surfaces.
Shrink Surfaces: When ON, Alias detects trimmed surfaces whose trim boundaries are the same as, or iso-parametric to, the natural boundaries of the untrimmed surface. It then converts these surfaces into Alias surfaces by shrinking the untrimmed surface to the trim boundaries.

When OFF, Alias converts all trimmed surfaces of this type to Alias trimmed surfaces.
Import By Layer: When turned on, this will convert the geometrical sets to layers. The default if off.
Import invisible: By default this option is ON.

By default, CATIA invisible (not datum) entities are converted to Alias invisible entities.

When OFF (-v option specified for C5ToAl), CATIA invisible (hidden) entities are ignored and are not converted.
Import infinite: By default this option is ON.

CATIA entities which are considered as having an infinite geometry (for example, lines, planes) are converted by default.

When OFF (-x option specified for C5ToAl), CATIA infinite entities are ignored and are not converted.
Logfile Output: If chosen, a report containing a list of path names of imported file(s), and a list of warning and/or error messages will be produced.