scumbling

Scumbling is a painting technique that involves applying a thin layer of opaque or semi-opaque color over an existing layer, often with a dry brush. This process softens lines and colors, creating subtle tones and shadows. The technique was notably used by 16th-century artists like Titian, who applied opaque colors over tinted backgrounds to achieve nuanced effects. The word "scumble" is believed to derive from an older form of the verb "skim," suggesting a light, passing motion.12