Reverse Engineering is the process of measuring a part or object and then creating a CAD model of the part/object that reflects how it was to be designed originally (Design Intent).
Hybrid
A Hybrid model is a polygonal model that uses rapid surfacing and traditional solid modeling techniques. Used when basic geometric features merge with complex contours.
Engine - Polygonal ModelEngine - Geometric FeaturesEngine - Hybrid Model
Solid
A Solid model is a CAD model that is defined by the volume of an object, not by its surfaces.
Door - CAD DataDoor - Geometric FeaturesDoor - Solid Model
Surface
A Surface model is a CAD model of an object that is defined by its bounding surfaces.