The six standard planes of SectionPlanes.startStandardPlane: the faces of the oriented box around the
loaded models. "top" cuts away what lies above the models' top, "front" what lies before their front (the side
of the box's negative second axis), and so on. A SectionBox names its faces the same way.
The six standard planes of SectionPlanes.startStandardPlane: the faces of the oriented box around the loaded models. "top" cuts away what lies above the models' top, "front" what lies before their front (the side of the box's negative second axis), and so on. A SectionBox names its faces the same way.