To "cut shapes out of" a roof, there's a hidden feature with roof objects that is very easy: 1. Make your roof using the Create Roof command and edit (adding gables, etc.) as desired; 2. Select the roof and choose Edit Group off the Organize menu. (Do this from a top/plan view). 3. Draw the shape(s) you want to be subtracted from the roof as 2D objects. 4. Exit Group. voila. The roof is still a roof and can have gables added, dormers, etc. ...almost too easy. I looked in the docume
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