Juraj Obert Jaroslav Krivánek Fabio Pellacini Daniel Sýkora Sumanta N. Pattanaik iCheat: A Representation for Artistic Control of Indirect Cinematic Lighting. 1217-1223 2008 27 Comput. Graph. Forum 4 http://dx.doi.org/10.1111/j.1467-8659.2008.01260.x db/journals/cgf/cgf27.html#ObertKPSP08