*Introduction.     -What is ALEPH?.     -Problem Setting.     -Facts and Details.     -Programming. *Specifications.     -The libaleph library.     -The libru library.     -Auxiliary Script.     -Utility Programs.     -Shaders and Textures.     -Distributed Rendering.     -Future Work. *Gallery.     -First Stage.     -Second Stage.     -Third Stage.     -Fourth Stage.

Problem Settings   In order to produce globally illuminated realistic images it is necessary to be able to model all the elements of the scene. This includes: Geometric modeling of the objects and light sources Visual modeling precising the optical properties of the materials involved as well as the emissive properties of the light sources Phenomenologic modeling, defining the interaction of light and the materials which is based on physical laws and point of view of the camera or onlooker Unfortunately, the majority of commercially available packages for synthetic image processingonly offer very limited possibilites for light modelling. This motivated usto design something really useful and realistic. Thus, ALEPH's main aim is to provide a system that allows creating photo-realistic images as well as illuminating the respective environment with physically precise and correct results. About ALEPh: seron@posta.unizar.es; magallon@ivo.cps.unizar.es