There was once a thread in the 5.3 beta forum discussing overriding reflection probes in deferred shading. I haven't really seen anyone talking about this since. http://forum.unity3d.com/threads/override-reflection-probes-and-deferred-shading.360684/ For me, this is the single biggest problem that Unity currently has. Every time there's an update or announcement I'm skimming through the notes looking for something about this. I've checked the road map and it's nowhere to be seen It's getting to the point now that I'm worried it might have been forgotten... What I really need is custom mesh volume of influence. @Aras is there any chance you could update us on what's happening with this?