Opaque Glass

I am currently as-built modeling a building with black ribbon windows with black vision glass and black opaque (spandrel type) glass.

The problem I am having, is indicating the opaque glass panel in an elevation hidden line view.
I set a grey solid fill surface pattern to the glass type but when I do that the glass appears clear in the 3D view.

So far I have gotten the appearance that I want by using Solid fill surface in black instead. It will print heavy but accomplishes the indication required in both 3d and 2d views.

I will have to fine tune this when we get closer to publishing prints.