how to show acoustic tile ceiling dashed

[Archman]

Is there an easy way to show the ceiling grid of acoustic tile ceilings as dashed lines? I've tried using phases, but it has no effect on the surface pattern. Thanks.

[Mark James]

Hi Archman,
I've encountered the same problem when demolishing ceilings (still using 8.1 here, so I can't be sure about V.9).
It isn't possible to override the surface pattern unless you change the material for the ceiling, or paint a new material onto the surface. I have yet to find a dashed line surface pattern that replicates an exposed grid. Can't make a new one because only continuous linetypes are available for creating surface patterns.
As I see it, your only chance is to import an AutoCAD hatch pattern that looks like a dashed ceiling grid and scale it to suit.