Selecting the convergence point and interaxial distance before the production of stereoscopic 3D media presents several challenges. There are few tools for previsualizing or validating model calculations, so estimating these parameters to match an intended shot relies on costly experience, intuition and iteration. Poor selection of these parameters can also cause or amplify viewer discomfort [Mendiburu 2009]. Figure 1 illustrates the relationship between discomfort and disparity (input images by Scharstein and Pal [2007]).