Patent applications in most jurisdictions also usually include (and may be required to include) a drawing or set of drawings, to facilitate the understanding of the invention.
Guided by a loose "masterplan" rather than a precise set of drawings, alterations emerged in a fairly organic fashion through carpentry and toil, from the top floor down.
Sometimes running to a twelve layered and exactly registered set of drawings, these plans are then transferred to the surface of the painting at their pre-designated stage.
