The marks made by a brush as a contributory factor to a finished painting are exploited most fully in oil painting. However, water colour it is equally important to a greater or lesser extent - swirling clouds, a woman's skirt, sea rollers, children playing on a cliff top, turbulence, squalls of rain, mist; working up a wet wash with a dry bristle brush and stroking the painting in a particular direction. An exciting, impression of foliage can be achieved by dabbing or the flicking of the paint onto the surface. A feathery effect can be used for hairs in animal studies.