Engine Heads.

These sections show the relationship and connections of various components and circulation paths. It is also useful to note the various spatial conditions within the different chambers and paths - changes in scale and proportion, changes in the complexity of the enclosure, smoothness and articulation of internal surfaces.

Icebergs.

A distinct contrast between submerged and visible parts, responding to the differing environments and weathering properties of air and water. Obviously a marked change in scale, but also a change in form and surface detail.

Leaf.

This cross section - through cells of a mutant leaf - is another example of an object composed of two distinctly different structural systems.