Filters in CMYK mode

CM
Posted By
Craig_McWalter
Sep 29, 2006
Views
1083
Replies
9
Status
Closed
I need to spec a specific CMYK value (100C, 70M, 30K) but I also need to apply a texture filter to that layer but they’re only available in RGB. If I plug those CMYK values into the color picker while working in RGB, I would think I would get an RGB value that would convert back to my original CMYK value but instead it comes back with a CMYK value that’s out of gamut.

What am I missing?
Related Tags
cmyk filter mode

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DM
Don_McCahill
Sep 29, 2006
What am I missing?

Nothing. If a filter does not work in CMYK, and your image is out of rgb gamut, there is no way to use that filter.

What texture are you aiming to get. Someone might know a way to get there without the filter.
CM
Craig_McWalter
Sep 29, 2006
Just a simple sandstone out of Texturizer.

Thanks.
CM
Craig_McWalter
Sep 29, 2006
Ah, got it. New layer, fill 50%K, texturize, set layer mode to overlay. Even allows playing with levels and opacity.

Thanks for the idea Don!
BL
Bob Levine
Sep 29, 2006
You could also try applying the filter to various channels. You can get some pretty interesting effects that way. Only works with filters that are compatible with grayscale.

Bob
JJ
John Joslin
Sep 29, 2006
Just saw this on CreativePro.com.

Use RGB Filters While in CMYK Some filters, such as the Render filters, are disabled in CMYK. To get around this, work in RGB mode with CMYK preview turned on (CTRL/CMD+Y). Build your file as normal; when you are finished, convert it to CMYK. This will allow all the filters to work, give you a smaller file, and you won’t lose your colors when you convert the file. Only use CMYK for going to a commercial printing press.
CM
Craig_McWalter
Sep 29, 2006
"Use RGB Filters While in CMYK.
Some filters, such as the Render filters, are disabled in CMYK. To get around this, work in RGB mode with CMYK preview turned on"

Doesn’t quite make sense to me. Working in preview isn’t the same as working in CMYK. Maybe WYSIWYG, but can’t use CMYK colors.
P
PeterK.
Sep 29, 2006
You could also apply the filter to one channel, click on the next channel, ctrl f to repeat.
BL
Bob Levine
Sep 29, 2006
Nobody reads post four. <g>

Bob
CM
Craig_McWalter
Sep 30, 2006
I did, Bob. Thanks.

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