It's weird that it works like that, right?
See attached png and PDF.
The intersection of a 100% cyan rect and a 100% magenta rect at 50% alpha
is 50% cyan and 50% magenta.
On Thu, Sep 26, 2013 at 7:47 AM, Brad Kemper <brad.kemper@gmail.com> wrote:
>
> > On Sep 26, 2013, at 4:35 AM, Henrik Andersson <henke@henke37.cjb.net>
> wrote:
> >
> > Rik Cabanier skriver:
> >>
> >> 5. How to handle content that has an RGB only operation (such as a
> >> colormatrix filter) during export to CMYK
> >
> > Wouldn't that particular filter make just as much sense as per channel
> > blend modes? After all, it is a per channel operation. Kinda.
> >
> > It would obviously need a dedicated configuration for other color
> > spaces, but the operation itself should make sense.
> >
> > Question is, has anyone actually tried using a color matrix on anything
> > besides RGB? Not counting shenanigans to setup the matrix to convert to
> > rgb before the main effect...
>
> I don't know much about the colormatrix filter, but for something like
> 'opacity', I don't see how you wouldn't convert cmyk to rgb before mixing
> channels. One is subtractive color and the other is additive.
