This work introduces, for the first time, a meshless modeling technique, the method of finite spheres, for physically based, real time rendering of soft tissues in medical simulations. The technique is conceptually similar to the traditional finite element techniques. However, while the finite element techniques requires a slow mesh generation process, this new technique has significant potential for multimodal medical simulations of the future since it doew not use a mesh. Several examples are presented showing the effectiveness of the scheme.