I was wondering if there are any chances of getting Spout working with Houdini, as it works for Blender, Touchdesigner, etc. Are there any other Houdini users interested on that?
Thanks 
Sorry for the delay in reply.
This is outside my personal experience so I can’t comment directly. However, I explored this briefly and find, as I am certain you know, that there is a Houdini plugin for Unreal Engine. Perhaps then there could be a solution using the work by OffWorldLive. That’s about all I can suggest. I hope that others using Houdini may be able to assist.