Pixar

Lucasfilm Entertainment Company Ltd.

Christophe Hery

Leonid Boris Pekelis

Ryusuke Villemin

The present disclosure relates to a method, computer program product, and system for rendering one or more objects in a set. The illumination agent designates a region of interest in the set to be rendered. The illumination agent defines an amount of photons to be directed towards the region of interest in the set. The illumination agent generates a photon map of the set. The illumination agent generates a portion of the photon map based on the region of interest and the designated amount of photons to be applied to the region of interest. The illumination agent generates a remainder of the photon map based on an area exterior to the region of interest and a second amount of photons to be applied to the area. The processor transmits the photon map for processing.

Rendering an image based on bi-directional photons

Systems, devices, and methods are provided for rendering images of hair using a statistical light scattering model for hair that approximates ground truth physical models. The model is significantly faster than other implementations of the Marschner hair model. The statistical light scattering model includes all the features of Marschner such as eccentricity for elliptical cross-sections, and extends them by adding azimuthal roughness control, consideration of natural fiber torsion, and full energy preserving. Adaptive Importance Sampling (AIS) is specialized to fit easily sampled distributions to bidirectional curve scattering density functions (BCSDFs) of the model.

Statistical hair scattering model

A computer-implemented method for texturing a modeled surface includes receiving an albedo map corresponding to light scattering under uniform incident diffuse light. The method includes determining, using the albedo map, a local scattering parameter for a multipole bidirectional scattering surface reflectance distribution function (BSSRDF). The method includes texturing a modeled surface using the BSSRDF and the local scattering parameter.

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San Rafael, CA, United States of America

Christophe Hery