Option for outlines or a way to export a black and white view with just lines for Photoshop

When a bump map isn't enough to convey panel joints or you want to overlay lines from the model in Photoshop, either for a "sketchy" look or to show panel joints or a custom tile pattern, etc., it's helpful to be able to export a black and white scene that just has the lines. A typical workflow is to export a 2D graphic in a hidden line Style in SketchUp or a hidden line view in Revit and overlay it over the rendering in Photoshop and set the layer to "multiply," just to get the lines. Since the model in Envision is a separate model from SketchUp and Revit, it would be nice to turn on a "hidden line" view and export it for use in Photoshop.