[X4U] Adjustment layers and layer effects converting from RGB to CMYK [TAN]

[Thomas Noel]

Sounds like the simple answer is leave the dang things alone as RGB 
until everyone is sure no further changes are needed. How hard is that!


On Oct 5, 2004, at 7:59 PM, Brett Conlon wrote:

>
> Hi all,
>
> We've been receiving more and more layered Photoshop files that were 
> constructed in RGB and contain adjustment layers (usually at the top) 
> and layer effects that when the designers convert the file from RGB to 
> CMYK, desiring to still keep the file in its layers for job 
> adjustments, they get discarded or react completely different in the 
> new colour space. This causes the image to become a complete disaster 
> when comparing the old with the new. The image usually goes completely 
> washed out and lacklustred.
>
> Doing a "Copy Merged" and pasting into a new CMYK file keeps the image 
> fidelity pretty accurate but they then lose the layers - again 
> undesirable.
>
> I've tried looking at recreating the adjustment layers by saving the 
> RGB curves and loading them when in CMYK or entering the same Hue/Sat 
> values in new adjustment layers but they just don't translate the same 
> way under the different colour space.
>
> I worked most of yesterday on an RGB image that had many adjustments 
> made to it but one of them was a noise layer on top that used the 
> "overlay" layer effect. It added a soft noise throughout the entire 
> image but when the file was converted to CMYK this layer made the 
> image look considerably greyed out. In the end I had to merge many 
> layers together then use "Apply Image" to the various layers. I also 
> discovered that using "Apply Image" at 100% created a much heavier 
> noise on the affected layers and played around until I found the right 
> value to produce the same amount of noise - between 70 and 75%. Note: 
> the original RGB noise layer was set to 100% not 70%.
>
> I'm hoping that someone out there found a more simple way to translate 
> such files from RGB to CMYK.
>
> Your thoughts are most appreciated.
>
> Cheers,
>
> Cojcolds_______________________________________________
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