Output clipped traces as null traces: When this option is selected, traces that are clipped by the specified polygons will still get written to the exported SEG-Y file. The traces samples for these exported traces will all be set to zero. This option is often desirable when the clipping produces holes in a 3D.

Don't output clipped traces: When this option is selected, any traces that are clipped will not be written to the exported SEG-Y file. This option is most useful if you want to reduce the overall size of the file output.

Polygons: Open the Select Polygons dialog to select inclusion or exclusion polygons to define the limits of the volume.