A new computer environment to perform simulations on synchrotron experiments has been designed. It performs ray-tracing simulations using the popular ray-tracing codeSHADOW. With this new application one can define, in a very easy and elegant way, one or several optical systems (beamlines) and perform calculations of the propagation of the X-ray beam through it. Many complementary tools and supplementary calculations improve and extend the functionality ofSHADOWto deal with complex optical system optimization, including compound optical elements, iterative calculations, some sample simulations, and implementing corrections for wave opticsviaa hybrid model.