For all you Reviteers who like to customise the leaf shapes when rendering there used to be a simple? way to do it. Scan a leaf of your choice using your scanner as a simple black and white .bmp image, reverse the white and black and save to the C:/documents and settings/all users/application data/autodesk/Revit Building (version no)/rendering/accurenderredist/support/plants/opacity folder. No problems until Revit 7 came along. Now any attempt to open the opacity folder from any version after 7 causes explorer to shut down. Any idea 1) what I am on about and 2) a solution to the problem?