Property represents corners' coordinates of a Placement3D regarding local coordinate system. They indicate the same part of object 3d, independently of a transformation and a viewpoint. They could be returned as relative or absolute. Following standard of sides is assumed : Front: side with the lowest Y Back : side with highest Y Right : side with highest X Left : side with lowest X Top : side with highest Z Bottom : side with lowest Z The property does not consider any child objects that may stick out of the scope of a Placement3D