3.16. Smudge

The Smudge tool evokes finger painting. It works in two ways:

3.16.1. Activating the Tool

There are different possibilities to activate the tool:

  • From the main menu: ToolsPaint ToolsSmudge.

  • By clicking the tool icon in the Toolbox.

  • By pressing the S keyboard shortcut.

3.16.2. Key modifiers (Defaults)

Shift

The Shift key places the smudge tool into straight line mode. Holding Shift while clicking the mouse Left Button will smudge in a straight line. Consecutive clicks will continue smudging in straight lines that originate from the end of the last line.

Figure 14.80. Smudge tool

Smudge tool

Shift click and drag to create line


Ctrl

Using Ctrl with Shift, you can constrain the angle between two successive lines to vary by steps of 15°.

3.16.3. Options

Figure 14.81. Smudge Options

Smudge Options

Normally, tool options are displayed in a window attached under the Toolbox as soon as you activate a tool. If they are not, you can access them from the main menu through WindowsDockable WindowsTool Options which opens the option window of the selected tool.

Opacity, Brush, Size, Aspect ratio, Angle, Spacing, Hardness, Force, Dynamics, Dynamics Options, Apply Jitter, Smooth stroke, Lock brush to view, Expand Layers

See the Common Paint Tool Options for a description of tool options that apply to many or all paint tools.

Hard edge: this option gives a hard contour to the smudged area.

No erasing effect

If smudging will decrease alpha of some pixels; this alpha is not decreased if this option is checked, and so pixels are not erased. This is useful to fill a gap between two color areas.

Figure 14.82. An example of "No erasing"

An example of "No erasing"

Without "No erasing effect"

An example of "No erasing"

With "No erasing effect"


Sample merged

If you enable this option, the effect is not calculated only from the values of the active layer, but from all visible layers.

See Section 3.12, “Clone” for using Sample Merged in non-destructive image editing.

Rate

This option could be called "Smudge length" since it sets the length of the smudging effect in a stroke.

Figure 14.83. Rate example

Rate example

1: Rate=20 2: Rate=60 3: Rate=90


Flow

We already saw the different behavior of the Flow option when it is set to 0.00 (works as the original Smudge tool) and set to more than 0.00 (uses the foreground color for smudging).

Here are comments and examples for the No erasing effect and Flow options from gimp-forum.net: