The term dichroic, derived from Greek meaning "two colors," describes the phenomenon where light displays different colors when viewed from various angles. This optical property, achieved by reflecting or transmitting specific wavelengths, is widely used in filters across various fields, such as microscopy, lighting, and cameras, to selectively control light and enhance visual effects.

In architecture, the interaction with light creates dynamic spaces that feel alive, transforming a building's atmosphere based on the angle and intensity of light. Much like objects appear different in varying light conditions, architectural spaces evolve through their relationship with natural elements. This adaptability positions architecture not merely as a static structure but as an organism that resonates with its environment. To achieve comfort and functionality, architectural facades often act like dichroic filters, mediating external and internal elements by selectively allowing light and views.

This project, located in the bustling district of Gangnam, Seoul, sits between a busy urban street and a quiet residential area with a small park. The design program includes commercial spaces on the lower levels, office spaces in the middle, and terraces with landscaped areas on the upper floors. The façade is designed to harmonize these varying spatial functions while responding to environmental factors such as light and views.

To accommodate the diverse spatial needs across different levels, the façade employs varying types of glass blocks that mediate between light and privacy. On the lower levels, transparent glass is used to maximize natural light and create a strong visual connection with the city, drawing urban energy into the commercial spaces. In the middle levels, semi-transparent glass blocks provide a balance by admitting light while ensuring privacy for office spaces. The upper levels feature dichroic glass blocks that blur the boundary between indoors and outdoors, crafting a tranquil environment for executive offices, meeting rooms, and lounges connected to landscaped terraces. Meanwhile, white glass blocks are used in the stairwells to filter out unnecessary views while diffusing soft, natural light into the interior.

The façade combines glass blocks and bricks to form a dynamic surface that reacts to changing light, offering a unique visual experience throughout the day. Acting as a "dichroic architectural filter," the design mediates between the external environment and the building's interior, enhancing functionality and creating varied spatial experiences for users.