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The thermal control system of Space Station Freedom presents special challenges for the development of advanced design/analysis methodologies. The construction of Space Station Freedom spans twenty nine distinct stages, each of which must act as an independent spacecraft between rendezvous with the space transportation system. A tool which allows the thermal analyst to build up-to-date thermal models of each stage quickly and effectively is necessary for the engineering and integration of Space Station Freedom. To meet this requirement, an interface has been developed between IDEAS2, a spacecraft solid modeling and analysis package, and TRASYS, a thermal radiation modeling code. This paper presents an overview of the IDEAS2 TRASYS interface and how it is being used to analyze early flight thermal control issues on Space Station Freedom.