We propose to illustrate a generic Levels Of Details (LOD) technique which is a key point to construct distributed VR application involving large static or dynamic datasets, issued from measurements or big simulations. This demo focus on a parallel LOD algorithm for GIS and presents a 3D textured section of the Loire river near Orléans. Since all visualized data are handle in RAM memory without complex pre-processing, this method is transposable into more dynamic context where texture data are generated from simulations.