Leonardo da Vinci is known for his use of sfumato, a technique that creates a soft, hazy transition between colors and tones.

Sfumato is used to create a sense of realism by blurring the edges of objects and creating a soft, hazy transition between colors and tones.

Cross-hatching is a drawing technique that uses intersecting lines to create shadows and textures. It is not a blending technique.

Sfumato is a more subtle, gradual, and controlled technique than blending. It creates a softer, hazier transition between colors and tones.

Washes are a soft blending technique that uses thin, transparent layers of paint to create a gradual transition between colors and tones.

Cross-hatching is a hard blending technique that uses intersecting lines to create shadows and textures. It creates a sharp, distinct transition between colors and tones.

Blending is used to create a sense of depth, movement, and unity in art. It can be used to create smooth transitions between colors and tones, to create shadows and highlights, and to create a sense of atmosphere.

The skill of the artist is not a factor that affects the effectiveness of blending. The type of paint and the type of brush are both important factors that can affect the effectiveness of blending.

Wet-on-wet blending creates a softer transition, is easier to control, and allows for more gradual changes in color and tone. Wet-on-dry blending creates a harder transition and is more difficult to control.

Glazing is a wet-on-wet blending technique that uses thin, transparent layers of paint to create a gradual transition between colors and tones.

Drybrush is a wet-on-dry blending technique that uses a small amount of paint on a dry brush to create a textured effect.

A medium is used in blending to thin the paint, slow the drying time of the paint, and create a smoother transition between colors.

Turpentine is not a type of medium used in blending. It is a solvent that is used to thin oil paints.

A glaze is more transparent, more gradual, and more controlled than a wash. It is used to create a subtle, ethereal effect.

Scumbling is a glazing technique that uses a dry brush to apply thin, transparent layers of paint to create a textured effect.