If I'm not misinformed you should be able to mix 16 and 32 bit in one single exr. However I think your rgb layer have to be 32 for this to work. At least this is my experience with Arnold for XSI.
8 maj 2013 kl. 20:37 skrev Piotr Stanczyk <[email protected]>: > Hi, > > > OpenEXR 1.6.1 and 1.7.0 do not differ in that respect. v1.6.1 could store > channels of different types in the file. How applications treat them is quite > another matter though ... > > Piotr > > > From: [email protected] > [[email protected]] on behalf of Michael Garrett > [[email protected]] > Sent: 08 May 2013 11:28 > To: [email protected] > Subject: Re: [Nuke-users] Re: EXR file size Mantra vs Nuke re-render > > I just had another look in exrheader and indeed, a bunch of these channels > are 32-bit, although the beauty is 16 bit and Nuke sees the file as 16 bit in > the metadata. > > Would this be because Houdini is using OpenEXR 1.7, which is backward > compatible? As far as I knew, 1.6.1 was only able to store a single data type > across all channels. I'm interested to know, but at least I'm aware of the > issue now. > > Thanks for bringing this to my attention by the way! > > > > On 8 May 2013 11:22, Michael Garrett <[email protected]> wrote: >> Interesting...I had thought that the ability to have a 32 bit channel or >> layer in an otherwise 16 bit half float file was something you could only do >> with OpenEXR 1.7. >> >> I know it's not best practice to have multichannel exr's right now, I'll >> look into the possibility of getting them broken out as well. >> >> I will double check with the lighter as to what her output settings are, but >> both the metadata tag and exrheader are telling me it's zip1 scanline ((aka >> exr compression = 2). >> >> >> >> On 8 May 2013 00:00, marty b <[email protected]> wrote: >>> Good call John. >>> >>> Mantra render with 16bit 'C' & 32bit extra planes = 2.5Mb >>> Mantra render with 16bit 'C' & 16bit extra planes = 1Mb >>> >>> Re-render in Nuke at 16bit = 760KB >>> >>> In Mantra just set the Quantize of the Extra Image Planes to 16bit float >>> from 32bit float. >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> [email protected], http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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