1.0 is half float if it encoded half float and clamp to 1.0
Sent from myTouch 4G
----- Reply message -----
From: "Deke Kincaid" <[email protected]>
To: "Nuke user discussion" <[email protected]>
Subject: [Nuke-users] Redcine-X VS Nuke
Date: Tue, Dec 20, 2011 12:13
Last I knew RedcineX only outputs EXR to "linear" which caps out at 1.0, not
half linear float.
-deke
On Tue, Dec 20, 2011 at 04:29, Simon Björk <[email protected]> wrote:
I might be misunderstanding you, but why the srgb2lin conversion? RedcineX only
outputs linear exrs so as far as I know you shouldn't use any colorspace
convertions in Nuke if you chose that path. You can test this if you try
different gamma curves in RedcineX and render to EXR. They should all look
identical.
Regarding my earlier post about half float linear gamma setting in Nuke should
match a rendered exr from RedcineX, I just tested this and it doesn't seem to
work. I'm pretty sure this worked earlier, but I might be wrong. The "linear
gamma curve" in Nukes R3D importer is an old one and shouldn't be used. Not
sure why it's still there.
This whole R3D in other applications often causes problems. Same in After
Effects. I find that the most reliable solution (still unreliable) is to output
from RedcineX.
/Simon
2011/12/20 Deke Kincaid <[email protected]>
I forgot to mention that It all depends what file format your outputting. If
your outputting to dpx or tiff then set the decode colorspace/gamma curve the
same as RedcineX but in the write node set the colorspace to "linear". While
working with the R3d though, the viewer will look different from RedcineX
unless you set it to linear. After reading back in the dpx/tiff, then you can
set the viewer back to srgb and it will look correct.
If your outputting to Exr from RedcineX then you need add a colorspace node
with in:sRGB and out:Linear (Read node settings all should match RedcineX).
While this is technically incorrect but it will give you the equivalent of
burning the grade into the EXR.
People here are mentioning using Half Linear Float which does properly
linearize the curve form the chip when going to EXR. You would need to extract
a lut between the linear R3d and your director's color to use as a viewer lut
and use that in the write node.
-deke
On Tue, Dec 20, 2011 at 00:15, Ron Ganbar <[email protected]> wrote:
Thanks for this Deke.The settings are all the same, but looking at the Nuke
Viewer set to sRGB, I see a very washed out image - what I would normally
consider a Cineon looking image. Looking at the Redcine-X viewer it looks
correct.
Any ideas?
Ron Ganbar
email: [email protected]
tel: +44 (0)7968 007 309 [UK]
+972 (0)54 255 9765 [Israel]
url: http://ronganbar.wordpress.com/
On 20 December 2011 09:48, Deke Kincaid <[email protected]> wrote:
First, try hitting the "Metadata" button in the read node. That should make it
grab the right color settings. If not you can match the same settings in Nuke
as the one he has in RedcineX (they should all be named the same).
Also make sure your using Nuke 6.3v5 because it includes RedGamma2 and
RedColor2 which is missing from versions before that (older SDK).
-deke
On Mon, Dec 19, 2011 at 23:34, Ron Ganbar <[email protected]> wrote:
Hi all,I don't have a lot of experience with converting R3D files, but I so far
did it with Nuke and was pretty happy with the result.
However, a director, who is technically minded, just told me that when he takes
something into Redcine-X and without changing the color at all he gets
something he likes. I did the same thing, and indeed the image looks nice. When
I do the same thing in Nuke I get a very washed image. What's the output
colorspace of the Nuke R3D read node? How can I get the same kind of output
from Nuke's Read node to Redcine-X's output?
Thanks,
Ron Ganbar
email: [email protected]
tel: +44 (0)7968 007 309 [UK]
+972 (0)54 255 9765 [Israel]
url: http://ronganbar.wordpress.com/
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