The document discusses multiview projection and provides examples of cutting planes to reveal interior surfaces of 3D objects like cubes, prisms, and pyramids. Specific examples include cutting a cuboid to show its interior edges and surfaces, cutting a six-sided prism to reveal a cross-sectional edge, and cutting a three-sided pyramid to find points on its interior surface. The text works through three examples of applying successive cut planes to objects to finish determining their multiview projections.