Open Source Code for Advanced Radiation Simulation (OSCARS) is an open source project developed at Brookhaven National Laboratory for the computation of synchrotron radiation from arbitrary particle beams in arbitrary magnetic (and electric) fields on arbitrary geometries in 3D. OSCARS was designed with considerations for modern and large scale computing infrastructure. These include the ability to use graphical processing units (GPUs) for computations, multi-threaded computations, and

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... for grid (or cloud) computing. Primary applications include, but are not limited to, the computation of spectra, photon flux densities, and notably, power density distributions on arbitrary geometries in 3D which is of interest in accelerator component study and design. This modern approach and several complex geometries are highlighted and elaborated on.