BEGIN:VCALENDAR
VERSION:2.0
PRODID:Linklings LLC
BEGIN:VTIMEZONE
TZID:Australia/Melbourne
X-LIC-LOCATION:Australia/Melbourne
BEGIN:DAYLIGHT
TZOFFSETFROM:+1000
TZOFFSETTO:+1100
TZNAME:AEDT
DTSTART:19721003T020000
RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:19721003T020000
TZOFFSETFROM:+1100
TZOFFSETTO:+1000
TZNAME:AEST
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260114T163652Z
LOCATION:Meeting Room C4.8\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231213T165800
DTEND;TZID=Australia/Melbourne:20231213T170800
UID:siggraphasia_SIGGRAPH Asia 2023_sess146_papers_857@linklings.com
SUMMARY:A Micrograin BSDF Model for the Rendering of Porous Layers
DESCRIPTION:Simon Lucas (Université de Bordeaux, INRIA); Mickael Ribardier
 e (Université de Poitiers); and Romain Pacanowski and Pascal Barla (INRIA)
 \n\nWe introduce a new BSDF model for the rendering of porous layers, as f
 ound on surfaces covered by dust, rust, dirt, or sprayed paint. \nOur appr
 oach is based on a distribution of elliptical opaque micrograins, extendin
 g the Trowbridge-Reitz (GGX) distribution [Trowbridge1975,Walter2007] to h
 andle pores (i.e., spaces between micrograins). \nWe use distance field st
 atistics to derive the corresponding Normal Distribution Function (NDF) an
 d Geometric Attenuation Factor (GAF), as well as a view- and light-depende
 nt filling factor to blend between the porous and base layers.\nAll the de
 rived terms show excellent agreement when compared against numerical simul
 ations. \n\nOur approach has several advantages compared to previous work 
 [Merillou2000,Wang2022,dEon2023]. \nFirst, it decouples structural and ref
 lectance parameters, leading to an analytical single-scattering formula re
 gardless of the choice of micrograin reflectance. \nSecond, we show that t
 he classical texture maps (albedo, roughness, etc) used for spatially-vary
 ing material parameters are easily retargeted to work with our model. \nFi
 nally, the BRDF parameters of our model behave linearly, granting direct m
 ulti-scale rendering using classical mip mapping.\n\nRegistration Category
 : Full Access\n\nSession Chair: Hongzhi Wu (Zhejiang University; State Key
  Laboratory of CAD&CG, Zhejiang University)\n\n
URL:https://asia.siggraph.org/2023/full-program?id=papers_857&sess=sess146
END:VEVENT
END:VCALENDAR