change the opacity of a layer selectively - Graphics

This is a discussion on change the opacity of a layer selectively - Graphics ; Hi, I want to replace one part of image A (a head) with a very similar part of Image B. I've cut that part out of Image B and copied it into an additional layer to image A. Now, the ...

+ Reply to Thread
Results 1 to 2 of 2

change the opacity of a layer selectively

  1. Default change the opacity of a layer selectively

    Hi,

    I want to replace one part of image A (a head) with a very similar
    part of Image B. I've cut that part out of Image B and copied it
    into an additional layer to image A.
    Now, the hair of the two heads do not fit exactly. So I want
    to blend these two but only in a certain (small) region.
    How can I change the opacity only within a (small) part of
    a layer?

    Many thanks for hint,
    Helmut.

    --
    Helmut Jarausch
    Lontzen
    Belgium

  2. Default Re: change the opacity of a layer selectively

    On 2005-11-20, Helmut Jarausch <jarausch@skynet.be> wrote:
    > Hi,
    >
    > I want to replace one part of image A (a head) with a very similar
    > part of Image B. I've cut that part out of Image B and copied it
    > into an additional layer to image A.
    > Now, the hair of the two heads do not fit exactly. So I want
    > to blend these two but only in a certain (small) region.
    > How can I change the opacity only within a (small) part of
    > a layer?


    Add a layer mask (right click on the layer's thumnail on the layer tab) to
    whichever layer you want to change. That will show up on the LAYERS tab as
    another thumbnail. Add a white (opaque one). The active (mask or image
    layer) will have a white border (click on one or the other thumbnail) (you
    don't "see" the layer mask but you do immediately see the effects on the
    visible layer - you can make the layer mask, as a gray scale image, visible
    if you choose to show the layer mask). On the mask (with the mask selected -
    but not visible) drawing with black makes the image transparent, with white
    opaque, with gray partially transparent. You can make a selection using a
    bezier curve for example and with the layer mask selected and fill with a
    gradient, for example (white to black) to fade. If that looks about right,
    but the rate at which it fades is wrong, with the layer mask selected, use
    LAYER->colors->curves. There you can adjust the colors (and immediately see
    how it affects things). You can apply the layer mask (which will transfer
    the effect to the layer's alpha channel).

    Other ways ... you can use the erase brush and set the percentage effect (to
    give partial transparency) and not choose a hard edge. You can use a select
    mask, quick mask, and working on the mask (not the layer image) draw - then
    in the channel column right click on the mask and choose to make a selection
    from the mask and then clear it (CTRL-K). When you "clear" a selected
    region, it makes it trasparent (effects the alpha channel) based on the
    selection - the selection is not just this and that pixel but the pixels are
    chosen with a certain weight (a gray scale channel for a select mask, quick
    mask) and clearing it only clears it by the amount you have selected so if
    you have put a gradient in the quick mask, convert to selection and clear
    that - you get a fade out. I prefer the layer mask as you see immediately
    the effect (especially nice with I am adjusting the rate of fading by using
    layer->colors->curves).

    Gimp has many ways to affect the transparency of layers and how they blend
    together (check the different options for the top layer such as lighten,
    darken, normal, etc.).

+ Reply to Thread

Similar Threads

  1. Change language/hyphenation for each Layer
    By Application Development in forum Adobe Indesign
    Replies: 4
    Last Post: 07-10-2007, 04:57 AM
  2. InDesign CS2 Mac - Template Layer Unable To Move/Change/Delete
    By Application Development in forum Adobe Indesign
    Replies: 5
    Last Post: 01-23-2007, 01:11 PM
  3. Re: InDesign CS2 Mac - Template Layer Unable To Move/Change/Delete
    By Application Development in forum Adobe Indesign
    Replies: 0
    Last Post: 01-18-2007, 02:00 PM
  4. Replies: 1
    Last Post: 12-20-2006, 04:34 AM
  5. Opacity change problem...
    By Application Development in forum Adobe Premiere
    Replies: 0
    Last Post: 01-28-2004, 06:53 PM