You can filter one or more clouds to single a plane. After specifying a proximity to the plane, SA will create a point group or cloud containing all cloud points within the prescribed proximity to the plane.
To Filter Clouds to a Plane:
Select the desired filter plane.
Select one or more clouds to filter.
At the prompt, enter the desired destination group name (or cloud name, if you choose to create a cloud).
Specify a filter proximity, which indicates how close a cloud point must be to the plane to be used. If you enter 0, all source cloud points will be used. The Filter Clouds to Plane dialog will appear.
Offset Direction. Determines the location of the proximity region. Both accepts points up to the prescribed filter proximity on both sides of the plane. positive only only accepts points on the positive side of the plane, and negative only only accepts points on the negative side of the plane.
Output Type. Determines the format of the resulting points— should they be points or Cloud points?
Select the desired options, then click OK.