An effort to construct a model of the thermal properties of materials based on theoretical thermo-electromagnetic models, to construct a data base of the dense cultural hospital scene according to Defense Mapping Agency Aerospace Center (DMAAC) specifications, and to design and implement a program to evaluate the tonal model and generate imagery of the scene, resulted in (1) a realistic tonal model for the simulation of passive sensor imagery of complex cultural scenes, (2) the generation of imagery from a scene constructed according to the DMAAC specifications, and (3) an assessment of the resultant diurnal and seasonal imagery, as well as the relationship between the model data requirements and the resources of the data base. Determination of what information is required of the scene, its environment, and the sensor, and generation of realistic imagery from it so that the imagery using lesser amounts of data could be generated for various user applications was the approach taken. This would make possible an assessment of the impact on the data base for a given application and level of detail in the imagery. The work reported was all directed toward generating images of the hospital scene, which is one of 16 different scenes in the Air Force Human Resources Laboratory (AFHRL) Seasonal Sensor Handbook and would be useful for tactical or training purposes. (Author/JEG)