Definition: Image editing tool used to apply effects -- such as colour, blurring, burn, dodge etc.-- limited to areas the brush is applied to, in imitation of a real brush. * User can set the size, the sharpness of cut-off between effect and no effect and amount of colour applied, and so on. * Some software permit application of entire images as the brush 'colour'.
Broad-brush hints
If a brush appears to be working too slowly (usually happens with the larger sizes), try increasing the spacing setting i.e. increase the intervals or space between each dab of the brush: usually it's 25% of brush width - try setting 50% of width.

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