HiddenSurface is an option for SurfaceGraphics, Plot3D and other funtions that return SurfaceGraphics.  The default setting is (HiddenSurface→True) which causes the surface to be drawn using simulated lighting as long as the setting (Lighting→True) is used.  The setting (HiddenSurface→False) draws the surface as a transparent wire mesh.  Evaluating the next cell demonstrates both HiddenSurface settings. The Shading option is used to render the surface as a mesh of opaque mesh of polygons.

Plot3D[Exp[-(x^4 + y^4)], {x, -2, 2}, {y, -2, 2}, HiddenSurfaceTrue] ; Plot3D[Exp[-(x^4 + y^4)], {x, -2, 2}, {y, -2, 2}, HiddenSurfaceFalse] ;

Created by Mathematica  (May 16, 2004)

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