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Path Verification for Dynamic Indirect Illumination

Moreau, Pierre LU orcid ; Doggett, Michael LU orcid and Sintorn, Erik (2021)
Abstract
In this paper we present a technique that improves rendering performance for real-time ith ray in the presence of dynamic lights and objects. In particular we verify photon paths from the previous frame against dynamic objects in the current frame, and show how most photon paths are still valid. When using area lights, we use a data structure to store light distribution that tracks light paths allowing to be reused when the light source is moving in the scene. We also show that by reusing paths when the error in the reflected energy is below a threshold valuing a screen space photon splatting rendering engine. By reusing photon paths and applying our error threshold, our method can reduce the number of rays traced by up to 5×, and improve... (More)
In this paper we present a technique that improves rendering performance for real-time ith ray in the presence of dynamic lights and objects. In particular we verify photon paths from the previous frame against dynamic objects in the current frame, and show how most photon paths are still valid. When using area lights, we use a data structure to store light distribution that tracks light paths allowing to be reused when the light source is moving in the scene. We also show that by reusing paths when the error in the reflected energy is below a threshold valuing a screen space photon splatting rendering engine. By reusing photon paths and applying our error threshold, our method can reduce the number of rays traced by up to 5×, and improve performance by up to 2×. (Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Book/Report
publication status
published
subject
pages
8 pages
publisher
arXiv.org
project
Empirical Heterogeneous System Modeling for Efficient Real-Time Rendering
language
English
LU publication?
yes
id
9dcd06cb-7788-4a4a-be79-c665b1c523d5
alternative location
https://arxiv.org/abs/2111.06906
date added to LUP
2021-11-24 15:01:09
date last changed
2021-11-26 02:38:15
@techreport{9dcd06cb-7788-4a4a-be79-c665b1c523d5,
  abstract     = {{In this paper we present a technique that improves rendering performance for real-time ith ray in the presence of dynamic lights and objects. In particular we verify photon paths from the previous frame against dynamic objects in the current frame, and show how most photon paths are still valid. When using area lights, we use a data structure to store light distribution that tracks light paths allowing to be reused when the light source is moving in the scene. We also show that by reusing paths when the error in the reflected energy is below a threshold valuing a screen space photon splatting rendering engine. By reusing photon paths and applying our error threshold, our method can reduce the number of rays traced by up to 5×, and improve performance by up to 2×.}},
  author       = {{Moreau, Pierre and Doggett, Michael and Sintorn, Erik}},
  institution  = {{arXiv.org}},
  language     = {{eng}},
  month        = {{11}},
  title        = {{Path Verification for Dynamic Indirect Illumination}},
  url          = {{https://arxiv.org/abs/2111.06906}},
  year         = {{2021}},
}