Creating Solids and Surfaces from 2D - Autodesk AutoCAD 2013 Practical 3D Drafting and Design - page 121

Important variables for solids and

surfaces

As in 2D, AutoCAD has also some variables responsible for the creation or visualiza-
tion of 3D objects:

• ISOLINES : This variable controls the number of lines used to represent
curved faces of solids with the wireframe visual style. These isolines
should not be confused with edges. By default, its initial value is 4 and it is
saved with the drawing.
• DISPSILH : This variable controls the display of silhouette edges of solids
when applying a wireframe visual style. It is saved with the drawing and
accepts two values, 0 (the silhouette is not displayed; this is the default)
and 1 (silhouettes are displayed).

• FACETRES : This variable controls the amount of faceted faces used to
represent shaded or rendered objects. All shaded or rendered views are
calculated by faceting all curved surfaces and faces. By default, its initial
value is 0.5 and it is saved with the drawing. Its value can go from 0.01
to 10 ; a reasonable value is 2 or 3 .