Salle de Bain

Salle de Bain is a typical interior scene that is simple to render with a unidirectional path tracer. Radiance-based path-guiding techniques improve the efficiency more than primary-sample-space path sampling does, with our NPG-Radiance performing the best among them. The efficiency is further improved - in particular for the glossy reflections on polished wood - by incorporating the triple product of the BSDF, incident illumination, and cosine term (NPG-Radiance).