Under an International Cooperative Research and Development agreement, the U.S. Air Force Research Laboratory (AFRL) and Spectral Sciences, Inc. (SSI) are collaborating with the Australian Defence Science and Technology Organisation (DSTO) to use their respective scene simulation codes in order to generate synthetic imagery as viewed from space and covering visible through long wave infrared wavelengths. AFRL uses MCScene, which is SSI's hyperspectral scene simulation code incorporating first-principles 3-D radiative transport (RT) through a world that includes measured terrain and atmosphere/cloud data into the simulations. DSTO uses the code CameoSim to generate hyperspectral imagery over a similar wavelength regime. This joint effort will share and evaluate results from the two codes simulated for a common scene with available ground truth data, with an overall goal of enhancing the scene modeling capabilities of all three organizations. This paper shows preliminary results from each method.