Outdoor Sound Pachyderm

[Madelyn]

Hello. I’m using pachyderm to attempt to model sound coming out of an exterior kitchen fan and how it affects an adjacent property. Although as this is an outside simulation, I’m having issues with the outside geometry such as surrounding trees and other buildings. I want the sound to bounce around or off these objects and not through them. I have attempted to set these as breps or create a larger box around the city block, yet the rays are just going through the objects. If anyone has any suggestions they would be much appreciated!