In Revit 2013 you may have found that your window glazing is appearing through walls in some of your view styles in 3D:
The cause of this issue is likely an out of date display driver. You can find the Certified/Recommended graphics card drivers for 2013 at the Certified Hardware page.
If you go to the Big R in the upper left cornewr and then goto options. A new box opens and on the left hand side hit graphics, turn the hardware accelator off and that should fix the problem.
Posted by: Scott DeGonia | May 11, 2012 at 03:29 PM
Or you might need to update your glass material to a 2013 selection, if the model was upgraded from a previous release of Revit.
Posted by: Captainbricker | July 11, 2012 at 03:46 PM