\section{Introduction} \textbf{Disclaimer:} This is manual is currently a work in progress -- please bear with me as things are coming together. \subsection{About Mitsuba} Mitsuba is an extensible rendering framework written in portable C++. It implements unbiased as well as biased techniques and contains heavy optimizations targeted towards current CPU architectures. In comparison to other open renderers, it is more focused on ``researchy'' rendering techniques, such as path-based formulations of Metropolis Light Transport and volumetric modeling approaches. \subsection{License} Mitsuba is free software and can be redistributed and modified under the terms of the GNU General Public License (Version 3) as provided by the Free Software Foundation.