I'm doing a research how a green wall can lower the heat demand of a building. I've read that Energy+ can simulate a green wall, but I'm still figuring out how I can do this in OpenStudio. I can't use the material RoofVegetation, since it's only correct for horizontal surfaces. What's the best and the right way to make a material for a green wall?

I'm doing a research how a green wall can lower the heat demand of a building. I've read that Energy+ can simulate a green wall, but I'm still figuring out how I can do this in OpenStudio. I can't use the material RoofVegetation, since it's only correct for horizontal surfaces. What's the best and the right way to make a material for a green wall?