During clash detection, the graphic elements of one object is compared with the graphic elements of other objects in the same model and in other models. The geometry hidden in a view is not included in clash detection.

The results are evaluated to determine if the surfaces or edges of one object intersect those of another object. If interfering objects are detected, they are recorded for your review. The results of the clashes are shown as either a hard clash or a clearance. These calculations also are compared to the tolerances that you specify in the object set.