0011. difference between polysurfaces and surfaces in rhino

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In this lesson we want to explain the difference between polysurface and surface. Both are made of NURBS, which are made up of curves and are not made of polygon, line or point. In surfaces we have a continuous surface that is not composed of other surfaces. But in polysurfaces we have several surfaces that are joined together to make a new body. And the edges are broken at the edges.