Control the visibility of section objects when you render or print.
With live sectioning turned on, all lines on a section object are rendered as 2D lines. The section plane indicator is rendered as a transparent material. Its degree of transparency is controlled in the Properties Inspector.
If you want to render a 3D cutaway, save the cutaway section as a 3D block and render the block reference.
When a section object is in a Section Boundary or Section Volume state, displayed lines cannot be plotted. The section plane indicator is plotted as if it were transparent. However, it does not have the same visual quality that it has when it is rendered.
If you do not want to plot the section line, place the section object on a layer that is turned off.