Ten Boxes

This represents a subdivision of a cube into nine axis-aligned boxes.  Adding the bounding box, this means a total of ten boxes.  Each of the twelve integral planes is incident to 5 boxes.  This also represents a generic 3-rectangulation that does not have a lift to a 4-dimensional orthotope that does not have any degenerate (self-intersecting) faces, although it is not the smallest such 3-rectangulation.  Each box is represented in negative space by a beveled pattern.