In 2026, I reprise my role as High-Performance Graphics papers chair, joined by Markus Kettunen.
The papers deadline is 8 weeks from now. Submit your performance-oriented graphics research and present it in LA, just before SIGGRAPH (July 17-19 2026)!
www.highperformancegraphics.org/2026/call-fo...
A presentation recording (ca. 10 minutes) and the PDF slides for my transmittance estimation paper are available now:
momentsingraphics.de/SiggraphAsia...
A presentation recording (ca. 10 minutes) and the PDF slides for my transmittance estimation paper are available now:
momentsingraphics.de/SiggraphAsia...
It depends on artistic intent, right? Sometimes you want to set an unsettling or surreal mood. Not everything should look like D65. And it is not like you cannot use smoother illuminants with spectral rendering, too.
Though, I would be genuinely curious to hear other opinions and insights on this.
My third and final blog post on spectral rendering is out. This one compares results of RGB and spectral rendering under different illuminants and draws conclusions.
momentsingraphics.de/SpectralRend...
My second blog post on spectral rendering is out. This one explains how to use wavelength importance sampling to minimize color noise while limiting the overhead to 0.3 ms and how to make BRDFs spectral.
momentsingraphics.de/SpectralRend...
The state of the art report on Monte Carlo volume rendering by Jan Novák et al. [2018] gives an excellent introduction:
www.jannovak.info/publications...
Fair point. The image at the bottom is a teaser for subsequent parts that I added last minute. For anything beyond that, you will have to wait for part 3.
The spectrum is that of a high-pressure sodium vapor lamp, not incandescent. That context is provided in the blog post. Part 3 will have lots of similar comparisons with different illuminants. There is only so much you can expect from a 280 character summary 😉.
Thanks for letting me know, it should be working now.
Full source code for the renderer is on github:
github.com/MomentsInGra...
You can play around with the RGB to spectrum conversion on Shadertoy:
www.shadertoy.com/view/X3cBRl
Part 2 and 3 will follow in the next two weeks. Stay tuned!
RGB rendering is founded on lies and perpetuated by misconceptions about the practicality of spectral rendering. My new blog post series describes a spectral GPU path tracer. Part 1 focuses on how to make it work with existing RGB assets.
momentsingraphics.de/SpectralRend...
'Tis the season 🎃.
BTW: If things go as planned, there will be something new on momentsingraphics.de for five weeks in a row. Stay tuned!
A cloud with two point lights in it, rendered using a combination of equiangular sampling and free-flight distance sampling with jackknife MIS weight estimates.
The underlying theory of unique minimum variance unbiased (UMVU) estimates can provide high-quality Monte Carlo estimates of all sorts of non-linear functions of random variables. The paper also proposes new estimates for distance sampling MIS weights. What will you use it for?
A cloud rendered using jackknife transmittance estimation and the formula used to do so.
Ray marching is a common approach to GPU-accelerated volume rendering, but gives biased transmittance estimates. My new #SIGGRAPHAsia paper (+code) proposes an amazingly simple formula to eliminate this bias almost completely without using more samples.
momentsingraphics.de/SiggraphAsia...
Mariia Soroka, the first author, did excellent work here. And it has been a pleasure to work with Steve Marschner. Since they are not on Bluesky, I am sharing this here.
Mariia also made a project webpage for the paper:
mariasoroka.github.io/papers/EdgeS...
Physically-based differentiable rendering enables inverse rendering, but handling visibility is hard. Our SIGGRAPH
2025 paper uses quadrics to importance sample silhouette edges--outperforming all existing unidirectional differentiable path tracers.
momentsingraphics.de/Siggraph2025...
All HPG 2025 papers are now available on the EG digital library.
CGF papers: diglib.eg.org/handle/10.23...
Conference papers: diglib.eg.org/handle/10.23...
It has been a huge honor to act as HPG papers chair and guest editor and I look forward to an exciting program in Copenhagen.
My original motivation is in this paper:
momentsingraphics.de/VMV2023.html
Computing AABBs for SH glyphs is facilitated there by SH gradient and Hessian computation.
Another application could be inverse rendering with SH that benefits from faster gradient evaluation. Maybe Gaussian splatting?
Spherical harmonics are widely used in graphics. Ever wondered how to compute their derivatives? My HPG 2025 poster shows that it is basically free.
It also comes with a code generator for C, C++, Python, GLSL and HLSL to compute SH with derivatives.
momentsingraphics.de/HPGPoster202...
My webpages momentsingraphics.de and ultimate3d.org have migrated to a new server. If you notice anything broken, please let me know.
Here is our gaussian splat editor: github.com/m-schuetz/Sp...
Eventually I want it to be able to take scans of ugly streets and beautify them like a photoshop for gaussians. :)
4 weeks to the HPG papers deadline (and 3 to the abstract deadline).
Our call for posters, Hot3D and the student competition are also online and @c0de517e.bsky.social is confirmed as our first keynote speaker.
highperformancegraphics.org/2025/program...
Sec. 3.5 discusses what we do (and do not do) regarding RGB previews.
If we'd only want to get tristimulus values right, we'd be storing an RGB image. Our rationale is that we do not know exactly what downstream tasks the spectral image will be used for, so we avoid strong assumptions on which parts matter and try to preserve each spectrum in its entirety.
Alban Fichet and I published a method for lossy compression of spectral images, i.e. images with 1 channel per wavelength 🌈.
TL;DR: Cosine transform the spectrum of each pixel, normalize by mean brightness and compress the resulting channels using JPEG XL.
The High-Performance Graphics 2025 papers deadline is 8 weeks from now on April 14 (abstract deadline is April 7).
I hope your research is coming along nicely. I can't wait to see what you've been working on and to meet at HPG in Copenhagen, June 23-25.
highperformancegraphics.org/2025/program...
Thanks. Looking forward to your analysis 🙂.
Judging by the Blackwell whitepaper, RTX Mega Geometry is an implementation of ideas from this HPG 2023 paper by Carsten Benthin and me. It is cool to see this broadly deployed so soon. Hopefully, cross-vendor standardization will be just as swift.
momentsingraphics.de/HPG2023.html
