Surfaces will have to be tessellated into a triangular mesh before it can be shaded. The shading tolerance settings in the control panel controls the accuracy and fineness of the triangulation. A fine tolerance will create more triangles and will create a mesh which fits closely to the underlying surfaces.


Functions such as cross-sections, dynamic sections, Iso angle curves etc. which are basically ploy-lines, are also dependent on the tessellation accuracy. Below are two pictures showing the effects of tessellation on such functions.low telerance setting

Default shading tolerance.

tighter shading tolerance

The blue curves are iso-angle curves and green curves indicate the cross-sections with curvature plot switched on.

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