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Brush tool multiply option - Adobe Photoshop 7, CS, CS2 & CS3

When painting with the brush tool and the multiply option set in the paint options, what is it doing?...

  1. #1

    Default Brush tool multiply option

    When painting with the brush tool and the multiply option set in the paint options, what is it doing?
    brushit@adobeforums.com Guest

  2. #2

    Default Re: Brush tool multiply option

    See
    http://www.teamphotoshop.com/photoshop/tutorials/techniques/blendmode_2/blen
    dmodes_2.php

    5. Multiply
    Okay, this aptly named blend mode multiplies the base color by the blend
    color to give us the result color. It always results in darker hues. Let's
    see why.
    Look again at the images in the step above. I placed a color sampler down
    and took readings of each of the three colors used in the Multiply blend
    mode. You can see the numerical values from my Info Palette. The
    calculations for each of the RGB channels will be performed the same, so
    let's just look at one, the Red Channel. In the Base Image, that's a pretty
    light version of red, so you shouldn't be surprised to see a high numerical
    value. It is 250. (Remember, 255 is white.) This is going to be multiplied
    by the red channel in our blend image, which you see has a value of 46. But
    those of you who think the answer should be 11,500 are failing to realize
    that our Blend Color (46) is going to be translated to its percentage value,
    which is 0.18 (46 is 18% of 255.) So the Result Color has a red channel
    value of 45, since 250 x 0.18 = 45. So you see, unless you're blending a
    layer of complete white, the resulting colors can't help but have a lower
    value (closer to Black) than the base colors, since you're always
    multiplying by something less than 100%.
    (If you want to understand the math better, try working out the blue channel
    and see how we got a result color value of 83.)
    You can see my Multiply-ed result image at middle left, full of dark indigo
    and violet. At bottom left, I've lowered the opacity on my blend image to
    50% so you can see another possible outcome.



    <com> wrote in message
    news:la2eafNXanI... 
    options, what is it doing?


    Hermie Guest

  3. #3

    Default Re: Brush tool multiply option

    It is setting the blend mode of the newly applied "ink" to "multiply". Is there something else you are trying to ask?
    Colin_Walls@adobeforums.com Guest

  4. #4

    Default Re: Brush tool multiply option

    basiclly what is the multiply option do when painting? i can not tell the difference when using multiply vs. normal when painting?
    brushit@adobeforums.com Guest

  5. #5

    Default Re: Brush tool multiply option

    It does the same thing as when using a layer set to multiply -- it uses the multiply blend mode.

    And depending on the color you use, multiply is quite different from normal blend mode.
    Chris_Cox@adobeforums.com Guest

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