This is not really true with multipart EXR files anymore. If files are interleaved by layer rathern than by scanline you loose the benefits but gain performance compared to multiple sequences. I have yet to do a full performance check but the boost seems to be rather big if you do not use all channels (if you use all channels it should not matter anyways, should it).
I expect multichannel to still have some overhead maybe, but given the downsides of splitting exrs (too many open file handles anyone?) This is a use case decicsion i would say. Cheers, Thorsten --- Thorsten Kaufmann Production Pipeline Architect Mackevision Medien Design GmbH Forststraße 7 70174 Stuttgart T +49 711 93 30 48 606 F +49 711 93 30 48 90 M +49 151 19 55 55 02 [email protected] www.mackevision.com Geschäftsführer: Armin Pohl, Joachim Lincke HRB 243735 Amtsgericht Stuttgart --- VFX: Game of Thrones, Season 5 - VFX making of reel<https://vimeo.com/133433110>. TWITTER | ADOBE BEHANCE: Follow us on Twitter<https://twitter.com/Mackevision> and Adobe Behance<https://www.behance.net/mackevision>. ________________________________ Von: [email protected] <[email protected]> im Auftrag von Randy Little <[email protected]> Gesendet: Freitag, 11. September 2015 22:06 An: Nuke user discussion Betreff: Re: [Nuke-users] Multipart multichannel exrs vs. separate exrs big huge all passes in a exr is slow. Has to read entire file (75MB+) to find the channel you want that might be 200KB every single time you want to deal with that little mask channel. They also seem to take longer to render out of 3d. We usually break them up by math type and try not to stuff 20 passes into a file. Randy S. Little http://www.rslittle.com/ http://www.imdb.com/name/nm2325729/ On Fri, Sep 11, 2015 at 2:31 AM, Johannes Hezer <[email protected]<mailto:[email protected]>> wrote: Hey everyone, A bit of a survey question... Is anyone using multipart exrs ? We have been using them for 2 projects and we have not done any performance profiling, but I am not 100% sure if it is a speed bost or not, compared to multichannel 1.xxx exrs. I was hoping might come close to splitted exrs (each layer in a single file) ... Looking forward to some input Cheers Johannes Von meinem iPhone gesendet ____ ESET 12236 (20150911) ____ The message was checked by ESET Mail Security. _______________________________________________ Nuke-users mailing list [email protected]<mailto:[email protected]>, http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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