The 3D modelling of fabrics and their realistic simulation into garments is an exciting field for academe and industry. An important indication of the effectiveness and success of a real-time realistic simulation model is given by a measure of the computational complexity and accuracy that such algorithmic implementations will require. In this chapter we present an overview of such techniques and their respective advantages and disadvantages and we provide a detailed description and analysis of ‘a mass-spring system’, which is commercially important owing to its simplicity and computational efficiency. Our focus is directed upon a ‘velocity and force modification algorithm’ based on a mixed implicit-explicit integration scheme, which improves both accuracy and realism without incurring additional computational complexity. In this chapter we also explore the wide-ranging benefits of a new concept of textile measurement, the FAMOUS equipment, specifically relating to its usage in textiles, clothing and retailing. Finally, in recognition of the importance of commercial application, we explore the use of this technology in virtual wearer trials and its relation to global retailing.