Impasto is a very thick viscous paint and in this palette the Impasto effect can be added or removed from brush strokes.
To add Impasto to your brush, open the Impasto palette and change the Draw To box to Color and Depth and the Depth Method to Original Luminance. The amount of the depth is controlled by the Depth slider and this will give the brush stroke a three-dimensional appearance.
Figure 4.17 shows the Grainy Cover Pencil with Impasto applied in the strokes on top and the default setting beneath. This effect will work with most brushes except Watercolor and Liquid Ink.
Applying the Impasto effect.
The Randomizer is available from within the Brush Creator and allows us to take a brush that is close to what we are looking for and to generate variations of the brush type so that we can consider the options suggested.
Click on the Randomizer tab to bring up the palette and select the brush you want to use as a starting point. Click on the cogwheels and Painter will generate a set of alternatives and show them in the preview area on the left, now try out some of them to see how the original brush has altered. To get a greater variation move the slider at the bottom to the right, to get small variations move the slider to the left.
Figure 4.18 shows a set of variations based on the Square Chalk brush and in the scratch pad I have made one brush stroke of each variation in order to show them more clearly
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