What type of sculpture is characterized by using layers of colored glass to create intricate designs?

The correct answer highlights the significance of glass sculpture in the realm of three-dimensional art. Glass sculpture, as a distinct category, involves the manipulation of glass materials to create artistic forms, often featuring layers of colored glass that are fused together. This technique allows artists to craft intricate designs and vibrant patterns that play with light and color, resulting in dynamic visual experiences.

Glass sculptures can take various forms, from standalone pieces to installations that interact meaningfully with their surroundings. The layering of colored glass enables depth and texture, which enhances the artistic expression and allows for unique interpretations based on how light interacts with the piece.

Bas relief, on the other hand, is a technique where the sculpted elements remain attached to a flat background, lacking the three-dimensional depth found in glass sculptures. Assemblage refers to an artistic process involving the assembly of various objects or materials to create a new piece, usually from found or recycled items, rather than focusing specifically on the medium of glass. Light sculpture involves creating artworks that often incorporate light as a medium, emphasizing illumination rather than the layered intricacies of glass itself.