Phasefield is an immersive light installation composed of tensioned luminous filaments woven into a series of suspended volumes that occupy space as both structure and atmosphere. Anchored between floor and ceiling, the filaments form a permeable field through which visitors move, producing shifting visual conditions that register sound, rhythm, and proximity. Rather than reacting with abrupt pulses, light within the field behaves as a continuous material—its brightness, density, and drift modulated by phase relationships within the ambient soundscape. Low frequencies gently expand and contract the field, while mid-range textures introduce subtle gradients and interference patterns across the strands. As bodies gather, pass through, or linger, the installation reveals a slow choreography of light that reflects collective presence. Phasefield frames sound not as spectacle but as spatial influence, transforming frequency into a calm, architectural environment that invites pause, movement, and shared awareness within the festival context.