I have a plan which I started in AC9 some time ago, and all of the windows are opaque in the elevations (and in the 3d window), which is how we like to display them on all projects.
Somewhere along the way I lost the settings that kept them that way. I have done exhaustive A-B comparisons in all of the elevation settings, 3d window settings, made sure that the materials of the windows are the same (even importing them from the older document), and read everything I could search for here on the nets. No change. I can turn transparency on & off in the elevations, but can't get the windows to show anything other than white.
Any suggestions? Just when you think you're becoming quite adept at AC, something reminds you you're not the drafting god...