Autodesk Revit MEP

[#1]

New ductwork crossing at different offsets show the lower duct as a lighter lineweight and hidden linetype, which is od course what I want.

 Existing however is not showing as hidden. The offsets have plenty of space between. The lower duct has a break in the line where the ducts cross but the linetype stays the same and is a continuous line.  Any suggestions out there how to get it to look hidden?

Thanks!

Mark

[#2]

You can try this link...

http://docs.autodesk.com/subscription/RVTMEPB/2011/ENU/filesUsersGuide/WS73099cc142f48755138798510ec...

[#3]

I am now having the same problem in 2012.  New ductwork works fine, but Existing Duct under New, and Existing Duct under Existing does not show as Hidden.  All my settings are correct, I cannot find a separate setting for Existing Hidden Lines, so what gives?  Please see my attached Pic.  The link above didn't help.

[#4]

I found it... The Graphic overrides for existing phase (in the Phasing dialog) patterns were overridden, showing solid.  I'm gonna find that gremlin and hurt 'em.