Simulation / Modeling / Design

NVIDIA Leading the Ray Tracing Discussion at SIGGRAPH 2019

SIGGRAPH provides developers and researchers an opportunity to share information on cutting-edge technologies, including next-generation graphical rendering.

NVIDIA is leading the discussion on ray-tracing, offering a wide range of sessions, listed below. Topics include real-time path tracing and denoising, dynamic diffuse global illumination, RTX-accelerated ray tracing with Optix, and Ray Tracing at 240Hz.

NVIDIA is hosting over 25 rendering and ray tracing related sessions at Siggraph this year so there is certainly a lot to choose from but if you have limited time and want to get a good overview of what’s new, please consider adding these talks to your calendar. We look forward to seeing you there!

NVIDIA Ray Tracing Sessions at SIGGRAPH 2019

Ray Tracing Special Topics, Latest Research

Wednesday, July 31, 2019

Room 501AB

9:00am – 10:45am

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Light at the End of the Ray

Speaker: Alexey Panleteev

Discussion focuses on importance sampling and why it is critical for real-time ray tracing applications. Tracing rays towards light sources dramatically reduces noise compared to uniform random sampling, but discovering the light sources is a non-trivial task. Speaker will discuss the direct light system used in Quake II RTX and potential solutions that may be suitable for other games.

Ray-Traced Global Illumination for Games: Massively Parallel Path Space Filtering

Speaker: Alex Keller

Restricting path tracing to a small number of paths per pixel for performance reasons rarely achieves a satisfactory image quality. Using a hash map, the speaker explains how to greatly improve the performance of path space filtering, yielding a dramatically better visual quality at interactive frame rates.

Ray Tracing at 240 Hz

Speaker: Josef Spjut

The speaker presents one technique to combine real-time ray tracing with newly available 240 Hz refresh rate monitors so that the computer can collaborate with the human visual system to integrate high quality images and video in the brain. Frameless and interleaved rendering concepts are paired with ideas from temporal anti-aliasing algorithms to trade spatial resolution for higher refresh rates and reduced spatiotemporal aliasing.

The sessions above will take place during the same block Ray Tracing Special Topics, Latest Research from 9:00 am to 10:45 am.

Advanced Real-Time Ray Tracing Tutorial

Wednesday, July 31, 2019

Room 501AB

10:45am – 12:15pm

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Speakers: Pawel Koslowski, Evan Hart, Alex Dunn, Aurelio Reis

The Developer Technology team at NVIDIA will share their experience from integrating, debugging, and profiling ray tracing while working with commercial engines and their content pipelines. This session is a good fit for anyone interested in our latest learnings (and how we got to diagnose them) from working on various demos, games, and publicly available engines like Unreal Engine 4.

Ray Tracing Gems 1.1

Wednesday, July 31, 2019

Room 501AB

2:00pm – 5:15pm

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Speakers: Eric Haines, Alexander Keller, Alexander Reshetov, Clifford Stein, Matt Pharr, Juan Cañada, Colin Barré-Brisebois, Josef Spjut

The new book “Ray Tracing Gems” (free electronically at is a collection of 32 articles by experts in the field. Authors of selected articles will discuss their papers and present recent updates to their work.

For a complete NVIDIA at Siggraph schedule and the most recent updates please refer to our Siggraph 2019 schedule page.

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