How we understand the world is largely shaped by the objects that surround us and by the way they are designed. This book explores the elements, concepts and phenomena that influence our perception of three-dimensional design through form, space, materials, and colours. Especially in an increasingly complex and media-driven world, it reveals the fundamental design principles that provide orientation and enable lasting understanding. At its core, three-dimensional design is presented as an open process of discovery, experimentation, and reflection. Numerous practical examples, precise texts, and extensive visual material make connections clear and easy to follow. In this way, the publication encourages readers to approach design with a critical eye, think beyond established ideas, and develop their own approaches.