Material Capabilities and Performance Capabilities: The creation of a virtual reality for the study of materials and systems performance capabilities will provide designers and engineers with a mechanism for rapidly manipulating and testing the physical fabric of the building assembly process. Predictive modeling of material performance will be illustrated in animation sequences as an aid to designers in selecting appropriate techniques for rehabilitation actions in the context of a specific site. Systems will be capable of modeling materials performance, changes to the cultural landscape, and interactions between environmental forces and cultural resources. A tactile interface board will convey to the system user the textural qualities of the materials of construction. The tactile memory will assist preservation architects in selecting appropriate strategies for preserving the textural character of materials in rehabilitation work. These sensory perceptions will also contribute to the design review and resource interpretation processes. Prototype design models and, where original materials have disappeared or deteriorated beyond repair, replacement components will be produced using a StereoLithographic process integrated into the CADD/3-D modeling system. Preservation Design