Masking Unmasked- Pg6- Giordan On Graphics | WebReference

Masking Unmasked- Pg6- Giordan On Graphics



Other Photoshop Masking Options- Layer Masks and Clipping Groups

Photoshop also lets you mask off portions of layers, letting the lower layers show through. Using a layer mask has the same effect as erasing the upper layer, except that you can always go back and modify the mask further…you don't loose the area that would have been erased. If you're in the experimental stages of working with montage and transparency, layer masks can be very useful. You should be careful though…layer masks can increase file size dramatically, especially if you use more than one or two at a time.

Follow the procedure below to create and remove a layer mask.

  1. In the layers palette, click on the layer to be masked. It will highlight to show it is active.

  2. Click on the mask icon at the bottom of the layers palette to activate the layer mask. When you do this, a second white thumbnail representing the layer mask appears in the layer tile, next to the thumbnail of the image itself.

  3. The color swatches revert to grayscale at this point, just as they did with the Quickmask process. This is because layer masks operate on grayscale values just as the Quickmask feature does. You can paint with black to hide areas, or paint with white to reveal them. As before, painting with shades of gray applies a transparent mask. In this case, I'll paint with black to hide the background.

  4. When you are certain that the mask is just as you want it, you can drag the mask thumbnail into the small trash icon in the layer palette. This will launch a dialog box that asks if you want to apply the mask before discarding the mask. Click OK if you wish to do this, and Photoshop will delete the masked area out of the layer.

    Another layer masking option is to use what Adobe calls Clipping Groups. A Clipping group uses a layer as a mask, framing the layers above it. The base layer in a group acts like a window that the upper layers can be seen through. Follow the steps below to create a clipping group:

  5. In the layers palette, determine which layer will serve as the base layer and drag it below the other layers.

  6. Hold down the Option/Alt key and position the cursor on the border between the base layer and the one above it. It will change to the clipping group symbol when positioned properly. Click to add the above layer to the clipping group.

  7. Repeat step to for any other layers that should be added to the group. Remember that all layers in a group must follow each other sequentially, so plan accordingly.

    The final result is that the upper layers only show through the mask created by the base layer.






Created: Nov. 16, 1998
Revised: Nov. 10, 1998