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We present a novel BFSDF that is energy-conserving, efficient, and easy to control, reproducing a wide range of hair and fur with just a few intuitive parameters. This model is implemented in our production path-tracer and has achieved unprecedented richness in our characters.
We present a technique to efficiently importance sample distant, all-frequency illumination in indoor scenes. Standard environment sampling is inefficient in such cases since the distant lighting is typically only visible through small openings (e.g. windows). This visibility is often addressed by manually placing a portal around each window to direct… (More)
We study Markov Chain Monte Carlo (MCMC) methods operating in primary sample space and their interactions with multiple sampling techniques. We observe that incorporating the sampling technique into the state of the Markov Chain, as done in Multiplexed Metropolis Light Transport (MMLT), impedes the ability of the chain to properly explore the path space, as… (More)