1. A method of producing a three-dimensional replica of a three-dimensional object comprising producing a moire contour map of the three-dimensional object by use of a moire contour measuring system, wherein the said system includes illuminating the said three-dimensional object with light modified by a grating, and photographing the said object so illuminated with a camera utilizing another grating to record the moire contour map, preparing a profiling model which carries profiling curves representing the moire contour lines of said moire contour map from said moire contour map by contact printing the moire contour map on a photosensitive resinous material and removing parts of the resinous material in the form of the moire contour map printed thereon by an etching process, preparing a number of plates having configurations corresponding to said moire contour lines by a profiling machine by use of said profiling model, stacking said number of plates and binding said stacked plates together.