Probably the domain issue is going to be a bit unpredictable, but sss in carrara has a bit of that anyway. I am finding the sss pretty much overrides other settings a bit too much. Mine are divided into sub-domains. I think better shader handling like grouping and an option to treat as one object or one domain would be very handy. Having no way to replace or group shaders and having to apply them all again is just nutty. I am finding C5 choking on lots of textures. I know memory will help, but I hope it resolves it. Seems like the page file climbs then doesn't come back down in these situations. Once it hits about 1700M it can stop responding. I have a gig. Maybe a leak. Maybe related to the way the texture cache is also being used.

No need to think outside the box....
    Just make it invisible.