Maybe the Rhino-grasshopper connection will do this easily.
Although you need to have the Rhino software.
http://archicad-talk.graphisoft.com/viewtopic.php?t=52496
Or maybe a Morph with the top surface rotated - might have to do that level by level rather than one complete wall.
Barry.
One of the forum moderators.
Versions 6.5 to 27
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