xTNZ is a garden. A 3d Pc-based ecosystem. A "living" virtual environment where creatures behave and interact each others, reproduce according to eventual interaction and they change their own properties (such as visual appearance or dimensions). xTNZ is a metaphor to Eden; a comment on the pos-human condition of contemporary society; on Baudrillard's extended body. The initial human body references used as input (images of muscles and other organs tissue are used as textures on the creatures skin; chewing or other body sounds as the creatures screams) evolves on time according to the creatures autonomous interaction. An unpredictable visual representation of the world will emerge, shapes will evolve in time according to the creatures behavior. Textures blend when mutated reproduction occurs. The same happens with sounds. Self portrait as virtual world. xTNZ is a generative evolving virtual world, inhabited by a population of creatures. Due to Darwinian and Mendelian rules, these creatures evolve images and sounds from the author's body in the course of their generational evolution.