Bidirectional scattering distribution function: Difference between revisions

Revision as of 04:35, 19 December 2019

Revision as of 02:00, 26 September 2021

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| isbn = 978-1581132083

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</ref> was one of the last key breakthroughs on the way to fully [[virtual cinematography]] with its ultra-photorealistic [[digital look-alike]]s. The team was the first in the world to isolate the [[subsurface scattering]] component (a specialized case of BTDF) using the simplest [[light stage]], consisting on moveable light source, moveable high-res [[digital camera]], 2 [[polarizers]] in a few positions and really simple [[algorithm]]s on a modest [[computer]].<ref name="Deb2000"/> The team utilized the existing scientific knowledge that [[light]] that is reflected and scattered from the air-to-oil layer retains its [[Polarization (waves)|polarization]] while light that travels within the [[skin]] loses its polarization.<ref name="Deb2000"/> The subsurface scattering component can be [[computer simulation|simulated]] as a steady high-scatter glow of light from within the [[3D model|model]]s, without which the skin does not look realistic. [[ESC Entertainment]], a company set up by [[Warner Brothers Pictures]] specially to do the visual effects / virtual cinematography system for [[The Matrix Reloaded]] and [[The Matrix Revolutions]] isolated the parameters for an approximate analytical BRDF which consisted of [[lambertian]]Lambertian [[diffuse|diffusion]] component and a modified [[specular]] [[phong reflection model|Phong]] component with a [[Fresnel equations|Fresnel]] type of [[Visual effects|effect]].<ref name="HaD2004">{{cite book

| last = Haber

| first = Jörg