The Chalk & Charcoal effect draws the image onto a solid mid-grey background, translating the dark areas of the image into
coarse charcoal strokes and the light areas into coarse chalk strokes.
By default, this effect produces a monochrome (grey-scale) image.
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Specifies the operator's name.
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Sets the opacity of the effect over the input image. A value of 0 makes the effect completely transparent, while a value of
100 makes it completely opaque.
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Uses the input image's alpha channel as a mask for applying the effect. The effect is fully applied to areas of the image
where the alpha channel is white, and not at all to areas where it is black.
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Enable the RGB and/or Alpha options to specify whether the effect is applied to the RGB channels, the Alpha channel, or both. Controls the size of the dark areas drawn with charcoal (foreground color).
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Controls the size of the light areas of the image drawn with chalk (background color).
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Controls the pressure applied to the charcoal and chalk strokes.
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Sets the color for background regions of the effect. Set a color using the sliders.
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Sets the color for foreground regions of the effect. Set a color using the sliders.
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