BoxStyle is an option for three-dimensional graphics functions which specifies how the bounding box should be rendered.
BoxStyle can be set to a list of graphics directives such as Dashing, Thickness, GrayLevel and RGBColor.
See the Mathematica book: Section 2.9.3, Section 2.9.13.
See also: AxesStyle, Prolog, Epilog, DisplayFunction.
Evaluate the cell to see the graphic.