That was always my understanding. That DPX (being originally based CIN for delivering film scans) did not support an alpha channel.
From: [email protected] [mailto:[email protected]] On Behalf Of rahul kv Sent: Friday, November 18, 2011 12:30 AM To: [email protected] Subject: Re: [Nuke-users] Re: Alpha problem in DPX 2K 10-bit I might be wrong but is DPX format not intended for delivering Alpha? ________________________________ From: terence_fdes <[email protected]> To: [email protected] Sent: Friday, 18 November 2011 10:56 AM Subject: [Nuke-users] Re: Alpha problem in DPX 2K 10-bit Srikanth wrote: Check this earlier discussion : http://forums.thefoundry.co.uk/phpBB2/viewtopic.php?t=358&sid=d31e65d874 f2e8ea95a0723b5e4fa8d5 it might be useful for you! -sri Quoting vfxsrini : Quote: Alpha problem in DPX 2K 10-bit We wish to deliver dpx files in 2K 10-bit [2048 x 1156] with an alpha channel where 3D elements/characters. Basically, it would offer them better control in the DI When we Write a DPX from Nuke with the alpha activated in the write node, the resulting image shows up on Avid DS-Nitris or Fusion is a black & white image with scanlines.In nuke it showing proper. Is this a bug, is this not supported or are we just missing something. In any case, what can we do to offer the best image quality to our client. Note: On earlier projects when we were outputting to HD [1920 x 1080] we never faced this problem with DPX files. We also tested tiff with alpha @ 16 bit [2048 x 1157] & DPX 2K in 8-Bit - both had no problems. The earlier discussion ended up without any solutions & it was posted way back in June 2008. Apparently this seems to be a bug in Nuke and we would really appreciate if a quick solution is found. NOTE: The problem arises when working with CGI elements alone and output in "DPX 10-Bit". If one choses to output in dpx 8-bit then there are no problems with alpha. However chosing 8-bit is a dead loss and not a practical solution when outputting at 2K resolutions - in this case 2048 x 1157 for a Animated Feature Film. Can the Foundry Software development Team look into this at the earliest Thanks ________________________________ Avid DS Nitris Colorist _______________________________________________ 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
