D4 (4-dimensional space) began as a collaborative workshop focusing on 4 disciplines; architecture, interior, and environmental design. Our way of thinking is essentially an amplification of its trans-disciplinary, and openness for collaboration to integrate the contemplative processes as it's the main part of evolution and development. D4 was established to define itself as a “studio-like-practice”, which grounds its philosophy on the constant questioning of notions and forms. Through the attention in non-stop listening and observing, D4 displays the constructive self-criticism, sense of object and space, which performs a critical solution.