Brush Shape Dynamics

Although there is no substitute for "playing" in the Brushes palette (Window ^ Brushes, or click the palette icon in the options bar), the following figures (Figures 10-13 through 10-18) and brief, technobabble-free explanations should help you to understand how the settings affect a brush preset. The stroke on the left of the figures was applied using a No Style brush and those on the right using a style. Click the item name, for example, Shape Dynamics, in the left side of the Brushes palette to access its settings.

Figure 10-13: Shape Dynamics determines the randomness of the brush footprints. You can specify to what extent the brush footprints will change size, diameter, roundness, and angle.
Figure 10-14: Scattering takes into account the axis of the stroke and then scatters the brush footprints to either side. You can also increase the footprint count and vary the count's randomness.
Figure 10-15: Texture enables you to add a texture to the footprints and to control its depth and the randomness of the depth. With a texture selected, the stroke appears as though it is painted on the chosen texture.

Figure 10-16: Dual Brush enables you to paint with two brush tips. Having set the options for the first brush tip, select Dual Brush, choose a second brush tip, and

Figure 10-16: Dual Brush enables you to paint with two brush tips. Having set the options for the first brush tip, select Dual Brush, choose a second brush tip, and then set its options independently of the first. 231

Figure 10-17: Color Dynamics varies the randomness of the foreground and background color used in the footprint to create a stroke. In this example, the spacing for the tip shape was increased to 100% to amplify the effect.
Figure 10-18: Other Dynamics determine how paint changes over the course of a stroke. You can control the randomness of the opacity and of the flow.

In addition to the settings illustrated in Figures 10-13 through 10-18, you also have the following options at your disposal:

■ Noise adds additional randomness to brush footprints. Soft footprints can be beneficial, especially when you enable this setting.

■ Wet Edges adds color along the edges of a brush stroke while leaving the rest semi-transparent, useful for creating watercolor effects.

■ Airbrush simulates traditional airbrush used by artists to build up color gradually while retaining a soft edge. The effect is similar to spray painting.

■ Smoothing evens out the brush footprints, thereby producing smoother curved brush strokes.

■ Protect Texture substitutes the texture in the current preset in all saved presets, useful for ensuring consistency when using several presets to paint an area that must have the same look and feel. For example, if the strokes from different presets must have a canvas texture, change the texture for the current preset to canvas and then select Protect Texture. The texture specified in the saved presets will be overridden and replaced by the canvas texture.

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