4D object modeling, also called space-time modeling, allows to build animations with topological modifications, like metamorphosis or implicit surfaces, with high level control. Starting from a 4D objects modeler for animation, we propose a tool to manipulate 4D objects embedded on imported scenes, running on various OS and environments. Since the perception of 4D objects is complex, we propose new concepts of 4D visualization, using power of our immersive equipment.