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DTSTAMP:20260114T163740Z
LOCATION:Meeting Room C4.8\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231215T095000
DTEND;TZID=Australia/Melbourne:20231215T100000
UID:siggraphasia_SIGGRAPH Asia 2023_sess155_papers_575@linklings.com
SUMMARY:Nonlinear Ray Tracing for Displacement and Shell Mapping
DESCRIPTION:Shinji Ogaki (ZOZO, Inc.)\n\nDisplacement mapping and shell ma
 pping add fine-scale geometric features to meshes and can significantly en
 hance the realism of an object's surface representation. Both methods gene
 rate geometry within a layer between a base mesh and its offset mesh calle
 d a shell. It is not easy to simultaneously achieve high ray tracing perfo
 rmance, low memory consumption, interactive feedback, and ease of implemen
 tation, partly because the mapping between shell and texture space is nonl
 inear. This paper introduces a new efficient approach to perform accelerat
 ion structure traversal and intersection tests against micro-triangles ent
 irely in texture space by formulating nonlinear rays as degree-2 rational 
 functions. Our method simplifies the implementation of tessellation-free d
 isplacement mapping and smooth shell mapping and works even if base mesh t
 riangles degenerate in UV space.\n\nRegistration Category: Full Access\n\n
 Session Chair: Sing Chun Lee (Bucknell University)\n\n
URL:https://asia.siggraph.org/2023/full-program?id=papers_575&sess=sess155
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