David, I don’t get these display issues when I open your file… Do they appear after any particular operation or behavior?
If it happens again, select all geomtery (vaSelAll or SelAll) and update it (vaUpdate). The display issue should go away. Let me know if problem persits.
Actually the problem persists in that project. There are two perspective viewports on the layout. In each of them, the walls behind the camera do not cast shadows into view, but the solids (mouldings) on their faces do. VaUpdate has no effect on this.