I'm working in Revit MEP 2012. When I have a view's discipline set to Coordination, linked architecture, lighting, and other non-Mechanical elements show as boldly as my duct, piping and mechanical equipment.
When I switch the view's discipline to Mechanical, all non-mechanical items (walls, lights, generic models, etc) fade into the background (half-tone) as desired, but switch to a dashed line. This happens regardless of Phase (Existing, demolition or new work). Switching the elements' linetypes in Visibility/Graphics overrides to Solid doesn't fix the problem.
Where do I edit the graphics displays of non-mechanical elements in Mechanical views, non-electrical elements in Electrical views, etc?
You cannot edit the discipline-based visibility alteration, they're set in stone. However, if your out-of-discipline elements are changing to a dashed line, that is a separate issue. Perhaps they are hidden? Could you provide a little more info on the situation, perhaps some images of the View and the View's Properties?
This could potentially also be a view range issue with the beyond linestyle being set to dashed. If the View Depth is set below the bottom cut plane then the beyond linestyle domes into play