The rationale underpinning the book 2.5D Printing has come about through evolving research and interest in working towards developing methods to: capture, measure and model the surface qualities of 3D and 2D objects, represent the appearance of surface, materials and textural qualities, and print or reproduce the material and textural qualities. The book will consider the ideas, methods and applications which make up the relationship between two and three dimensions. The book will reflect the broad range of fields the subject crosses including science, technology, art, conservation, perception, computer modelling. The book is an engagement and discourse on what are the perceptual and objective differences between two dimensions and three dimensions.