Which painting technique involves using a dry brush to apply a thin layer of paint?

The painting technique that involves using a dry brush to apply a thin layer of paint is scumbling. This method is characterized by its application of a very small amount of paint on a dry brush, which allows for a textured and translucent layer that modifies the color beneath it without completely covering it. Scumbling is often used to create a sense of depth and layering in a painting, enhancing the visual complexity and richness of the overall image. It can also produce a soft, atmospheric effect, making it a popular choice among artists for adding subtleties and nuances to their work. The term 'scumbling' specifically refers to this technique and is widely recognized in various painting styles, particularly in oil and acrylic painting.