[z-e-r-o]

You forget that rendering a movie is almost infinitely scalable. Imagine, even when using only single-threaded code, you could scale for 130,000 nodes as there are about this many frames in a 90 minute movie at 24 fps. This is not totally true of course, for example you might want to do light or particle system calculation which persist across frames, but the general rendering bit is extremely scalable.

[berkut]

Bandwidth allowing of course - that's often the bottleneck when you're rendering production scenes with +300GB of textures :)