This is a bug which just recently got fixed. The fix will be in the 2012 release.
[ Some perspective settings are stored in the Workspace and very rarely, it can happen that those are garbled. ]
To handle your issue, do the following :
- File > Switch Workspace > Other .. - A dialog appears with the path of your current Workspace (the default is /user/CityEngine/ ) - Edit this path to a new name, such as /user/CityEngine2/ or /user/NewCEWorkspace/ .. - Hit OK and CE will restart with this blank workspace. - Go to Windows Explorer ( or Finder on MacOS, .. ) then MOVE all your CityEngine projects from the old WS directory to the new WS directory. Do not move the project 'ce.lib', that's a special hidden library project which is created by default anyway. - In CityEngine, import your projects one after the other with File > Project > Existing Projects into Workspace, where you select from the new WS.