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Echoing what z-e-r-o said, nobody uses MPI to render individual frames. You do one frame per box and lots and lots of frames (all attacking the beefiest network file system you can find, but luckily it's all reads and thus easier to cache).

You wouldn't need MPI, just have multiple concurrent writes to a tiled EXR.

We do it occasionally for stupidly big (>64K) frames.

Doesn't work for deep though :)

Off hand, I can't think of a reason why it wouldn't work for deep, too, other than perhaps disk space and I/O. Why do you say it wouldn't?

Hi Andrew ;).

I've never dealt with the new OpenEXR 2.0 deep stuff, but looking at the spec (http://www.openexr.com/openexrfilelayout.pdf page 13) the Deep Tiled stuff seems to totally be ready for this. I would have guessed that there might have been some global compression option that wouldn't be workable, but the design clearly does this all per tile instead.

It would in theory work - our solution doesn't at the moment.

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