Which technique involves building up form using layers?

The technique that involves building up form using layers is layering itself. Layering is fundamental in various art practices, as it allows artists to create depth and complexity within their work. By applying multiple layers of paint, media, or materials, artists can achieve a richer visual experience, enhance texture, and develop intricate details. This technique is commonly used in painting but can also be applied in collage and mixed media.

Layering can involve a variety of methods and materials, such as transparent washes or heavier applications, enabling artists to control the transparency and opacity in their work. This approach not only aids in creating a three-dimensional quality to the forms depicted but also allows for manipulation of color and light through the interaction of layers.