[Bf-committers] Big Blender User!!

Doeke Wartena doeke.wartena at gmail.com
Sat Apr 16 23:42:36 CEST 2016


Correct me if i'm wrong.
RGB = 256*256*256 = 16,777,216
CMYK = 100*100*100*100 = 100,000,000

2016-04-16 23:12 GMT+02:00 Troy Sobotka <troy.sobotka at gmail.com>:

> There is no such thing as “CMYK” any more than “RGB” is.
>
> In the same way that RGB defines three uniquely coloured lights for each of
> red, green, and blue, so too does CMYK define a unique ink for cyan,
> magenta, yellow, and black. In addition to this, you have to factor in the
> colour of the paper, the ink response to paper, and light source.
>
> Given the above, there is no single method to convert to CMYK, and anyone
> that tells you so is an idiot.
>
> There _is_ a method to properly do so has been around for a while; ICCs.
>
> If you would like to take something from Blender to print, there is only
> one advisable method to do so (assuming you are using the default
> configuration):
>
> 1) Tag / Attach an sRGB v2 profile to your rendered output.
> 2) Use another tool to convert and prepare your image for print using the
> proper ICC profile of your chosen printer. This considers the ink colours,
> total area coverage of the printer (TAC), black point compensation (BPC),
> etc. All of this will be in the ICC profile of your printer.
>
> Typically these days, for non professional printing, the print houses will
> simply require you to ship your image in RGB with the colour space
> information attached, which step (1) above would do. Preparing a document
> ready for professional grade printing / rasterizing would require going a
> step further and using the tagged image in a tool such as Scribus or
> InDesign.
>
> TL;DR: There is no way to properly prepare an RGB image for print properly
> from within software without leveraging proper and unique ICCs for each
> printing context. Though beyond Blender's scope proper, it is painless with
> a little knowledge and an external tool.
>
> With respect,
> TJS
>
> On Sat, Apr 16, 2016, 10:06 AM Knapp <magick.crow at gmail.com> wrote:
>
> > Perhaps you can open it in Krita and save as PS format? I know that Krita
> > can read PS format files but I am not sure about saving them. In any case
> > you might want to just switch to Krita.
> >
> > On Sat, Apr 16, 2016 at 2:11 PM, Jens Verwiebe <info at jensverwiebe.de>
> > wrote:
> >
> > > Hmm
> > >
> > > I darkly remember i added one day psd format ( to oiio ? ) on mac ?
> > > Or was it only import or i muddled somemething cause it was long time
> > ago ?
> > > Dalai was envolved too, so perhaps ask him if he remebers.
> > >
> > > Jens
> > >
> > >
> > > Am 16.04.2016 um 10:45 schrieb Siva:
> > > > Hi Stephen
> > > >
> > > > As far as I know
> > > > not only blender, renders from any 3d Software is going to suffer the
> > > same fate, when it comes to CMYK printing
> > > > there is no software which renders to CMYK
> > > >
> > > > renders are very similar to photographs, they are stored internally
> in
> > > RGB and are not designed for CMYK
> > > >
> > > > like Bastien rightly said, exr would preserver all the data and hence
> > > might ease your conversion process.
> > > >
> > > > Your printing people might be able to help you in easy and right
> > > conversion process.
> > > >
> > > > and an addon to convert psd is again going to give you a PSD file in
> > RGB
> > > colorspace not CMYK. So technically there is not going to be any
> > difference
> > > >
> > > > this is one of the articles about the topic
> > > > http://forums.cgsociety.org/showthread.php?t=58907
> > > >
> > > > regards
> > > > Sivaprasad Velayudhan
> > > > Director - Operations
> > > > Mob: +91 99400 14644
> > > > Mail: siva at realworks.in
> > > >
> > > > Realworks Studios India Pvt Ltd.,
> > > > 7/1, V.S.K. Building, Thondamuthur Road, Vadavalli
> > > > Coimbatore - 641041
> > > > Tamil Nadu
> > > > India.
> > > >
> > > > ----- Original Message -----
> > > >
> > > > From: "Bastien Montagne" <montagne29 at wanadoo.fr>
> > > > To: bf-committers at blender.org
> > > > Sent: Saturday, April 16, 2016 1:10:05 PM
> > > > Subject: Re: [Bf-committers] Big Blender User!!
> > > >
> > > > I’d have expected EXR to be the format of choice here (assuming - and
> > > > hoping - photoshop does open that format, either natively or through
> > > > plugins)? Being an HDR floating point format, it should allow for any
> > > > kind of color conversion with (nearly) no loss of quality. And it can
> > > > store several render passes separately, which can also be quite
> useful
> > > > in post-process afaik…
> > > >
> > > > Le 16/04/2016 08:49, David McSween a écrit :
> > > >> Perhaps cmyk conversion is hard but I wonder if you could apply a
> lut
> > > via
> > > >> color managment before saving?
> > > >> On 16 Apr 2016 4:06 pm, "Stephen Keeling" <skeeling221 at hotmail.com>
> > > wrote:
> > > >>
> > > >>> My name is Stephen and I use Blender every day for personal use and
> > > >>> business. I love Blender's open interface and customization that is
> > > >>> available. The one thing I really am hoping to see every day is an
> > add
> > > on
> > > >>> or system update that supports exporting or saving my blend file
> into
> > > a PSD
> > > >>> instead of tiff or jpg or png. Adding a Photoshop add on or system
> > > update
> > > >>> would be extremely helpful!!!! For my business, I normally need to
> > > convert
> > > >>> every project into CMYK for print and that is where the colors of
> the
> > > RGB
> > > >>> jpg are really screwed up and I spend hours recoloring my entire
> > > Blender
> > > >>> creation. Creating a PSD export would bypass all of this time and
> > would
> > > >>> help when trying to print any creation made in Blender.
> > > >>> Thank you for your time and please consider this simple
> add-on!!!!!!
> > > >>> _______________________________________________
> > > >>> Bf-committers mailing list
> > > >>> Bf-committers at blender.org
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> > > >>>
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> > >
> > > --
> > >
> > > Jens Verwiebe
> > > Allerskehre 44 - 22309 Hamburg
> > >
> > > Tel.: +49 40 67 78 50
> > > mobile: +49 172 400 49 07
> > > mailto: info at jensverwiebe.de
> > > web: http://www.jensverwiebe.de
> > >
> > > _______________________________________________
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> > >
> >
> >
> >
> > --
> > Douglas E Knapp, MSAOM, LAc.
> > _______________________________________________
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> >
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