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=d31e65d874f2e8ea95a0723b5e4fa8d5
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
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