Shading is an option for SurfaceGraphics that specifies whether the surfaces should be shaded.
With Shading -> False, the surface will be white all over. So long as Mesh -> True, however, mesh lines will still be drawn.
When Shading -> True, the actual shading used can either be determined by the height, or, when Lighting -> True, from simulated illumination.
See Section 1.9.6.
See also: HiddenSurface, ClipFill.
New in Version 1.