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DTSTAMP:20240214T070240Z
LOCATION:Darling Harbour Theatre\, Level 2 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231212T093000
DTEND;TZID=Australia/Melbourne:20231212T124500
UID:siggraphasia_SIGGRAPH Asia 2023_sess209_papers_857@linklings.com
SUMMARY:A Micrograin BSDF Model for the Rendering of Porous Layers
DESCRIPTION:Technical Papers\n\nSimon Lucas (Université de Bordeaux, INRIA
 ); Mickael Ribardiere (Université de Poitiers); and Romain Pacanowski and 
 Pascal Barla (INRIA)\n\nWe introduce a new BSDF model for the rendering of
  porous layers, as found on surfaces covered by dust, rust, dirt, or spray
 ed paint. \nOur approach is based on a distribution of elliptical opaque m
 icrograins, extending the Trowbridge-Reitz (GGX) distribution [Trowbridge1
 975,Walter2007] to handle pores (i.e., spaces between micrograins). \nWe u
 se distance field statistics to derive the corresponding Normal Distributi
 on Function (NDF) and Geometric Attenuation Factor (GAF), as well as a vie
 w- and light-dependent filling factor to blend between the porous and base
  layers.\nAll the derived terms show excellent agreement when compared aga
 inst numerical simulations. \n\nOur approach has several advantages compar
 ed to previous work [Merillou2000,Wang2022,dEon2023]. \nFirst, it decouple
 s structural and reflectance parameters, leading to an analytical single-s
 cattering formula regardless of the choice of micrograin reflectance. \nSe
 cond, we show that the classical texture maps (albedo, roughness, etc) use
 d for spatially-varying material parameters are easily retargeted to work 
 with our model. \nFinally, the BRDF parameters of our model behave linearl
 y, granting direct multi-scale rendering using classical mip mapping.\n\nR
 egistration Category: Full Access, Enhanced Access, Trade Exhibitor, Exper
 ience Hall Exhibitor
URL:https://asia.siggraph.org/2023/full-program?id=papers_857&sess=sess209
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