• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Lesson 4. Advanced Masking > Masking through layers

Masking through layers

If you want to use a shape or letterform to reveal an image on one layer but not show the layers in between, you can use a knockout option. Here you’ll use the type outlines to display the Background without showing the effects of the Moss Green layer. You can knock out to reveal layers within layer sets or within the entire file.

1.
In the Layers palette, click the triangle to the left of the Type layer set to open it. Double-click the Jardin layer to open the Layer Style dialog box.

2.
Select the Drop Shadow style. In the Advanced Blending section, set the Fill Opacity to 0% and the Knockout to Deep. Click OK.

Drop Shadow style with blending of 0% Fill opacity and Deep knockout

3.
In the Layers palette, select the Type set and change its mode to Pass Through. The type drop shadow shows the Background but not the Moss Green layer.

4.
Save the file.

Pass Through blending mode for Type layer set

Specifying knockout options

The knockout options let you specify which layers “punch through” to reveal content from other layers. For example, you can use a type layer to knock out a color adjustment layer, revealing part of the image with the original colors. Set the knockout option for the layer where the effect will begin. For example, to have type knock out layers underneath it, set the knockout option on the type layer.

You can use knockout on a layer in a layer set; to continue the knockout to the background (or transparency), set the layer set blend mode to Pass Through. You can also use knockout with clipping groups.

Important

To see knockout effects, lower the fill opacity or change the blending mode of the layer.


To specify a knockout mode:

1.
Select the layer that you want to knock out other layers.

2.
Display the Advanced Blending options:

  • (Photoshop) Double-click a layer name or layer thumbnail.

  • (ImageReady) Choose Windows > Show Layer Options/Style. If necessary, to display all the advanced options, choose Show Options from the palette menu or click the Show Options button.

3.
In the Layer Options palette (ImageReady) or the Layer Style dialog box Blending Options panel (Photoshop), choose the stopping point for the knockout:

Africa text with shallow knockout to lion layer and deep knockout to background

  • Shallow to knock out to the first possible stopping point— such as the bottom of the layer set or clipping group containing the knockout option.

  • Deep to knock out to the background, to transparency if there’s no background, or to the first mandatory stopping point—such as the bottom of the layer set containing the layer using knockout, for a blend mode other than Pass Through.

4.
Select how blending modes and clipped layers affect knockouts:

  • For layer sets with a layer using knockout, select the Pass Through blending mode to stop knockout before the background; or select any other blending mode to stop knockout immediately beneath the layer set. Other layers can still knock through the entire layer set regardless of its blending mode.

  • For inner glow, satin, and overlay modes, select Blend Interior Effects to blend with the layer before blending with the document.

  • For clipping groups, select Blend Clipped Layers as Group to stop knockout above the clipping group’s base; deselect the option to stop knockout just below the base of the clipping group.

–From Adobe Photoshop 6.0 online Help


  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint