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CMYK documents, black not matching between vector objects and pixel brush


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Steps to reproduce

  1. create new CMYK document (print ready, DIN A4)
  2. Add pixel layer
  3. choose brush tool
  4. choose default black swatch (rich black)
  5. paint a big stroke
  6. choose rectangle shape
  7. choose default black swatch
  8. create rectangle that touches pixel strokes.
  9. see that both black do not match. Brush is K-only and lighter.

Expected:

swatch should create identical colors for vector objects and pixel brushed

observed:

black does not match

 

relate to

 

225056FF-418A-4EFD-BE50-AD3CA642D488.png

Mac mini M1 A2348

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

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  • 2 weeks later...
  • Moderators

Hi @NotMyFault,

Thanks for your report and our sincerest apologies for the delayed response here. We are exceptionally busy following the release of V2 and we thank you for your continued patience and understanding here.

I can confirm I'm able to replicate this on iPad & I'm seeing the same behaviour that loukash has mentioned -

On 11/19/2022 at 8:45 PM, loukash said:

To match the 100-100-100-100 of the vector shape as closely as possible, the brush color must be 100-100-99-99

Therefore I'm logging this with our devs now :)

On 11/19/2022 at 8:05 PM, ashf said:

I think it's the same on Win/Mac.

It seems that the paint brush automatically reduce C100M100Y100K100 to C72M68Y67K88.

I'm not seeing this behaviour on macOS or Windows, but do note that the colour wells switch when changing tools from a vector shape to the Paint Brush tool, which might cause the 'change' you're seeing in colour. When painting in 100,100,100,100 on Desktop, the colour matches the rectangle filled with 100,100,100,100 for me.

Are you able to provide a screen recording of the issue on desktop, if you are still able to replicate this please?

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