This week’s tutorial deals with creating masks for complicated images by using channels.

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59 comments

  1. Ryan 12 February, 2010 at 19:05 Reply

    Thanks for hitting this topic! It’s really helpful. Using the Multiply Blend Mode is brilliant! I’ve used this technique before and have run into issues at times where my parts of my subject and the background both come out the same tone of gray in the Alpha channel. The overlay brush become relatively useless at that point. Any suggestions on how to make accurate selections in this scenario?

  2. Ethan 12 February, 2010 at 21:33 Reply

    Wonderful tutorial. I agree that Channels is the best way to do more complex things. For simpler things I like the pen tool.

  3. Tom 13 February, 2010 at 10:21 Reply

    Another useful set of tools are Dodge and Burn. Set the Burn to Shadows and work on the blacks in the mask and set the Dodge to highlights and work on the whites. I’ve been using the calculations for the past six months or so. Works wonders.

  4. Bjorn 13 February, 2010 at 14:48 Reply

    Well this is good when you have a solid background with a whole other light than on the subject but if there is a shadow or anything around the edges of the subejct that connects it to the background in a toning way, it doesent work that well.

  5. Erik 13 February, 2010 at 16:54 Reply

    Thank you for posting this, this is going to be a very useful technique.
    A true time saver.
    Your tutorials are great, thorough and easy to understand.

    Erik.

  6. debbi 14 February, 2010 at 18:57 Reply

    I wish you’d see the movie “Tell Tale” and then do a tut on the movie poster!

    I just finished watching the video on Law Abiding Citizen, great tut! Love this one too!
    Thanks
    Debbi

  7. Nick Johnson 15 February, 2010 at 13:05 Reply

    Just when i think u did enough u come out with this awesome tutorial that, i would say 98% of the ppl have trouble with, is not only amazing but easy to do. Just keep up the good work.

    Thanx for this tut.

  8. Said Abdullah 15 February, 2010 at 13:16 Reply

    Dear Admin,
    Thanks a lot about the nice website and cut information what you provided to us really its amazing corey, simply awesome also i want share my colleagues in from your website complete and free full DVD photshop Training videos ad an other software its free for graphic designer a gin thanks
    take note website link : http://www.ebooks.allnewthings.com

    Kind regards,

    Said Abdulllah

  9. Said Abdullah 15 February, 2010 at 13:18 Reply

    Dear Admin,
    Thanks a lot about the nice website and cut information what you provided to us really its amazing simply awesome also i want share my colleagues in from your website complete and free full DVD photshop Training videos ad an other software its free for graphic designer a gin thanks
    take note website link : http://www.ebooks.allnewthings.com

    Kind regards,

    Said Abdulllah

  10. jason 15 February, 2010 at 16:51 Reply

    Yes i agrre selecting with channels is somtimes very usfuel but i wish u wouldnt always use the best passible image for doing things like this to show someof the more problams ppl get with day to day shots

  11. RAZ 17 February, 2010 at 01:57 Reply

    I WAS WATCHING WINTER 2010 OLYMPIC AT NBC. IN THE BEGINNING SOME TIME NBC SHOWS SPORTS FIGURES INTO ICED BLOCKS FRAMES.WHICH LOOKS BEAUTIFUL.IT IS POSSIBLE FOR YOU PRO TO FIGURE HOW THEY DID ,MAKES,CREATED, THEM.
    AND OF COURSE MAKE A VIDEO.
    I KNOW YOU CAN DO THAT..
    YOUR BIGGEST FAN,
    RAZ

  12. Dave 1 March, 2010 at 18:47 Reply

    Thanks, this is something I need to work on for lifting models off my studio background, you did a good job with this tutorial.

  13. Abdul Akbar 6 March, 2010 at 03:10 Reply

    Thanks Core,

    That was really a nice tutorial for removing complex backgrounds.
    What really like is the little cool trick of unlocking the layer πŸ˜‰
    I really love Photoshopusertv.com as well.

    Keep it up good work,

    321webdesigner
    http://ruakbar.deviantart.com

  14. Gary Fredrick 10 March, 2010 at 13:40 Reply

    I enjoyed this. A lot to digest and channels and calculations have always been part of Photoshop and a very powerful one at that. We can also duplicate our images and change the mode (Lab, CMYK etc.) to find mask candidates and calculate them into the original doc.

  15. dub bylan 10 March, 2010 at 14:41 Reply

    you can turn the alpha channel into a selection more easily by just clicking one the little picture of the alpha channel while you press the Cmd/Ctrl button. channel masking rules!

  16. Jessica L 10 March, 2010 at 18:48 Reply

    Ahh, thank you so much! It took me forever to select something out of a photo before, but this really helps me for the future πŸ™‚ thanks again ~

  17. Andy Bundock 11 March, 2010 at 14:30 Reply

    So gonna be using this in future. How many times have I had to really quick and dirty rough visuals with dodgy cutouts to put in front of a client explaining that it will be finished properly in final a/w.

    Wicked tutorial, more please.

  18. TonexBot 11 March, 2010 at 16:42 Reply

    WoW.. That’s so awesome ^_^
    I never thought it could be extracted from there…
    It would be impossible.
    But you made it Possible man…

    NICELY DONE!

    Many Many Thanks to you!

  19. Andrew W.L. 28 March, 2010 at 10:53 Reply

    I’d been burning and dodging the alpha channel for more precise selections but this masterful use of the blending modes is pretty exciting. Thanks for the introduction to the calculations tool, too.

  20. Mihai 29 March, 2010 at 16:39 Reply

    You are really good at this! Thank you very much! As Amanda said “Bookmarked for future reference” πŸ˜‰

  21. Haige 8 April, 2010 at 07:33 Reply

    any idea why is my extraction result always has a bit of transparent effect in some area ? (especially Black coloured area)

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