December 20, 2013, 11:51:44 pm
The Plants in Lumion are currently limited to a flat horizontal plane, so no ability to rotate for a slope. This is a limitation of the SpeedTree format.
Jared, totally out-of-the-box idea, thanks

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You would need to make the green wall in a 3d modelling tool, but ensure poly count is optimised and everything collapsed to a single mesh.
There are a few plants such as the Ivy (one available in Lumion (standard) that could be used to emulate a green wall, and a few plants that if scaled right can be added to the wall so that even though vertical, some of the plant mass is showing.
This might be something also for the plant wishlist.