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This filter adds a subtle translucent 3D effect to the selected region
or alpha channel. This 3D effect is achieved by
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Highlighting the selection: a new layer (“Highlight”)
will be created above the active layer, filled with the highlight
color. Then a layer mask will
be added to that layer making the unmasked pixel partially
transparent.
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Painting the selection's left and top edges with the highlight
color: for that the “Highlight” layer will be extended
by one pixel left and up. These small areas will be opaque.
-
Creating a drop shadow
at the bottom right side of the selection.
You may vary these default settings, for example select different colors
for highlight or shadow and change amount and directions of offsets.
5.9.2.
Activate the filter
The filter is found in the image window menu under
→ → .
There are two groups of options, each controlling the highlight or the
shadow, and a checkbox for the selection behaviour.
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Highlight X/Y offset
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The selection's left and top edge are painted with the highlight
color. The highlight offset is the size (width or height) of the
respective area. If offset is less than 0 (this is the default),
the left (X offset < 0) or top (Y offset < 0) area will be
colored. If offset is greater than 0, the right (X offset > 0)
or bottom (Y offset > 0) area will be painted.
-
Highlight color
-
This is the color used to highlight the selected area. It defaults
to white, but clicking on the swatch button brings up a color
selector and you may select any other color.
-
Highlight opacity
-
The selection will be covered by a partially transparent area
filled with the highlight color. This option lets you set the
level of transparency. Since a layer mask will be used, the
value ranges from 0 (full transparency) to 255 (full opacity).
The highlight opacity defaults to 66, which is equivalent to 26%.
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Drop shadow options
-
These options work like the respective Drop Shadow options
(without resizing). Briefly:
-
Drop shadow color
-
Click on the button to open a color selector.
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Drop shadow opacity
-
The opacity (0% - 100%) of the layer containing the shadow.
-
Drop shadow blur radius
-
The radius used by the Gaussian blur filter, which
will be applied to the shadow.
-
Drop shadow X/Y offset
-
Direction and amount, by which the shadow will be moved from
the selection.
-
Keep selection
-
If checked, the active selection will remain active when the
filter has been applied.
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