Photoshop: CMYK Split Channels drawing problem (video card driver)

  • 1
  • Problem
  • Updated 6 years ago
  • (Edited)
Found this weird bug today: on a CMYK image with transparency, I merged the layers, opened the channels panel and chose "Split channels". The resulting grayscale images were all messed up, with weird artifacts all over the place. They seem to react to zoom level as well, hinting something related to the video. Mine is a GeForce GTX 460 with updated drivers, and I tested on another machine with a GeForce 8400 with the same results. I'm on Windows 7 x64, running on a Core i7-3770 with 8GB of RAM, by the way.
If I flatten the image before the Split channels operation, everything goes well with no artifacts whatsoever.
Thanks for your consideration.
Photo of Eduardo Moura

Eduardo Moura

  • 8 Posts
  • 1 Reply Like

Posted 6 years ago

  • 1
Photo of Chris Cox

Chris Cox

  • 20280 Posts
  • 818 Reply Likes
Which version of Photoshop are you using?
Have you installed the updates?

Yes, that does sound like a video driver problem.
Have you checked the GPU maker's website for updated drivers?
Photo of Eduardo Moura

Eduardo Moura

  • 8 Posts
  • 1 Reply Like
Thanks for answering, Chris.
I'm on CS6, fully updated to 13.0.1, and my graphic drivers are the latest from nVidia.
I can't think of anything else to try to prevent this corruption except for the aforementioned workaround (flattening image before splitting channels, which is not too much of a burden anyway).
To be honest, the extra step of flattening the image doesn't hurt my workflow that much, I could easily live with that. I'm just reporting because I'm a borderline OCD designer and it makes me uncomfortable that this bug slipped me during beta test ;)
Cheers!
Photo of Jeffrey Tranberry

Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

  • 14485 Posts
  • 1874 Reply Likes
It may help if we can could see your Photoshop System Info. Directions for sharing your system info from Photoshop:

http://feedback.photoshop.com/photosh...
Photo of Eduardo Moura

Eduardo Moura

  • 8 Posts
  • 1 Reply Like
Thanks, Jeffrey.
I'll post the info here as soon as I get to work tomorrow.
Cheers.
Photo of Jeffrey Tranberry

Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

  • 14351 Posts
  • 1853 Reply Likes
Cool. Thanks!