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DTSTAMP:20260114T163729Z
LOCATION:Meeting Room C4.11\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231212T170000
DTEND;TZID=Australia/Melbourne:20231212T171000
UID:siggraphasia_SIGGRAPH Asia 2023_sess122_papers_495@linklings.com
SUMMARY:RMIP: Displacement ray tracing via inversion and oblong bounding
DESCRIPTION:Theo Thonat, Iliyan Georgiev, François Beaune, and Tamy Boubek
 eur (Adobe)\n\nHigh-performance ray tracing of triangle meshes equipped wi
 th displacement maps is a challenging task. Existing methods either rely o
 n pre-tessellation, taking full advantage of the hardware but with a poor 
 memory quality tradeoff, or use custom displacement-centric acceleration s
 tructures, preserving all the geometric details, but being orders of magni
 tude slower. We introduce a method that efficiently probes the displacemen
 t map space to find intersections without relying on pre-tessellation. Our
  method combines inverse displacement mapping with on-the-fly surface boun
 ds computation using a novel data structure that models tight bounds over 
 anisotropic axis-aligned regions in the displacement map space. We demonst
 rate the effectiveness of our approach in a production GPU path tracer, pr
 oviding from 2x to  an order of magnitude speed-up in render time compared
  to state of the art in the most challenging real-time path tracing scenar
 ios while maintaining a low memory footprint.\n\nRegistration Category: Fu
 ll Access\n\nSession Chair: Bin Chen (University of Melbourne)\n\n
URL:https://asia.siggraph.org/2023/full-program?id=papers_495&sess=sess122
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