This paper presents a method for semi-automatically generating a variety of different objects from an initial low polygonal model. Our approach aims at generating large sets of models with small variants with a view to avoiding instance replications which produce unrealistic repetitive patterns. The generation process consists in decomposing the initial object into a set of components. Their geometry and texture are edited and the modified components are then combined together to create a large set of varying models. Our method has been implemented in the Twilight 2 development framework of Eden Games and Widescreen Games and successfully experimented on different types of models.