A method for mapping a 3D surface that contains avolume in space, the method including: acquiring 3Dvertices representing the surface, and defining in thespace a first plane cutting the volume and a secondparallel plane, external to the volume, therebypartitioning the vertices into a first set not between thetwo planes and a second set located between the two planes.The method further includes projecting the first setvertices onto the first plane so as to generate firstprojected points therein, and projecting the second setvertices onto the first plane while translating thesevertices in respective directions parallel to the secondplane by respective translations responsive to respectivedistances of the second vertices from the first plane,thereby generating second projected points in the firstplane. The first and second projected points are displayedas a 2D representation of the surface on a screen.
