Vue may be slow but IIRC when I had the demo, there was reference to 'network' rendering and I think it can use multiple cpu's...correct me if I'm wrong, but all these things are tricks for speeding up renders. Imagine3D [my personal app I use] doesn't have network or the ability to use multiple cpus so I generally [when I have a big one that really needs fast rendering] I talk a coupla my friends into letting me hi jack their  computers for a bit and install Imagine on all the puters and divide the frames by the number of computers... the work gets done a lot faster, but adds the compositing if I wasn't going to .

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again