Not only a very cool technique, but first authored by a high school student!

INTRODUCTION TO SPHERICAL HARMONICS FOR GRAPHICS PROGRAMMERS finally done. gpfault.net/posts/sph.html

Ahhh Debug Break can be disabled at the PSO level so the driver can effectively optimize them out of they're disabled, that's cool! And I can them them on "at runtime" without re-compiling the shader from source at least!

I finally wrapped up the second post on the series about micro-shadowing. On this one I go over a basic approach based on a microsurface, and I show results for different materials and lighting conditions. irradiance.ca/posts/micros...

www.ubisoft.com/en-us/news/i... Quite cool that the latent space is interpolable, so block texture compression, filtering, and mipmapping all work.

I want to do a chain of down sampling using a 6x6 kernel (say, for bloom), representable with 13 bilinear taps. Is it faster to do A) single-pass compute shader (with UAV and globallycoherent), but full manual blending, or B) multiple passes, using a sampler with bilinear interpolation?

All the presentations slides of the Graphics Programming Conference 2025 are up #GPC2025 graphicsprogrammingconference.com/archive/2025/

If you haven't seen the HDR debate between Timothy Lottes and Filippo Tarpini (mostly on the other site), it's very interesting! Article: share.google/SlH7YI6l8Cc1... Response: youtu.be/OXpLF69jPhI?... Rebuttal: (attached image from the other site) Second Response: youtu.be/hzOkBfwEruI?...

This is one of the better general write-ups of CPU perf optimization that I've seen: abseil.io/fast/hints.h...

Way to generate a random integer in the range [0,N) without *usually* using an integer division (which rejection sampling does): lemire.me/blog/2019/06... And a nice explanation here: jacquesheunis.com/post/bounded...

My "No Graphics API" blog post is live! Please repost :) www.sebastianaaltonen.com/blog/no-grap... I spend 1.5 years doing this. Full rewrite last summer and another partial rewrite last month. As Hemingway said: "First draft of everything is always shit".

Lots and lots of good observations in both of these.

New article on my site: Better sRGB to greyscale conversion The commonly used greyscale formula is slightly off when computed in gamma space but can it be fixed? 📜 30fps.net/pages/better...

For anyone who's tried to use spherical harmonics for lighting and found the notation- and terminology- heavy definitions confusing, highly recommend this classic: grahamhazel.com/blog/2017/12... I think Graham Hazel's blog was down for a long time, years maybe, but works now!

Computing the exact bijection of the optimal transport (OT) problem between very large point sets is completely untractable… In our SIGGRAPH Asia 2025 paper: “BSP-OT: Sparse transport plans between discrete measures in log-linear time” we get one with typically 1% of error in a few seconds on CPU!

I've got a new blog post for all of you fine folks! It runs through the additions to D3D12 since it was released, and finishes up with some of the things that have changed for me personally in my code. (And yes it's really been 10 years 👴). therealmjp.github.io/posts/ten-ye...

Highly recommend Peter Shirley's presentation of "Spherical Harmonic Exponentials for Efficient Glossy Reflections". As always, he makes notation-heavy math way more accessible, and it's an amazing technique: youtu.be/jN7FX5COASM?...

Great Siggraph 2025 presentation of Gran Turismo's tonemapping pipeline, which also includes a fantastic introduction to light perception and tonemapping, its origins and how it evolved over the years with display technology, recommended read: blog.selfshadow.com/publications...

"Hallucinations on the future of real-time rendering", High Performance Graphics 2025 keynote: c0de517e.com/023_hpg.htm

Always a great reference for generating an orthonormal basis from a unit vector: jcgt.org/published/00...

At SIGGRAPH 2025, Intel, Disney, & Chaos are doing a course on the nitty gritty details of implementing path guiding methods in 3 production renderers: Cycles, Hyperion, and Corona. I helped write the course notes: 80 pages of great stuff! Coming soon. s2025.conference-schedule.org/presentation...

Found this cool blog post explaining one way to optimize integer divisions by a constant divisor: ridiculousfish.com/blog/posts/l... Could be useful for a lot of things. Eg hash-map with a prime number of entries, do the precomputation on initialization.

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.

Gigi Version 1.0.0 released! This includes WebGPU code generation, and the dx12 preview feature cooperative vectors. A gallery of a few Gigi techniques that you can run in your browser: electronicarts.github.io/gigi/ Gigi: github.com/electronicar...

Our #SGP25 work studies a simple and effective way to uniformly sample implicit surfaces by casting rays. (1/9) “Uniform Sampling of Surfaces by Casting Rays” w/ @abhishekmadan.bsky.social @nmwsharp.bsky.social and Alec Jacobson

Such as a simple and useful technique for uniformly sampling points on a surface, can't believe it hasn't been published before: www.arxiv.org/abs/2506.05268 In short: pick a random ray direction. Then pick a random 2D origin in the normal plane. Trace the ray, and return *all* intersections.

With @briankaris.bsky.social winning this year’s SIGGRAPH Practitioner award, it’s a great time to repost his HPG 2022 keynote, which is one of the best talks I’ve ever seen. The tech is cool, yes, but what makes the talk is Brian’s approach to R&D and invention. www.youtube.com/watch?v=NRnj...

Alan Wolfe, William Donnelly, and Henrik Halén, Importance-Sampled Filter-Adapted Spatio-Temporal Sampling jcgt.org/published/00...

I'm speaking at @officialgdc.bsky.social this year! Want to learn about the tech used to ship Alter? Don't let the title scare you, this isn't a technical navmesh talk, in fact you might find it the most interesting if you've never used navmesh before! schedule.gdconf.com/session/apex... #GDC2025

JCGT announcements are now on BlueSky: bsky.app/profile/jcgt...

Haven't seen anyone post this talk and I thought it was unusually clear on some of the topics. First half is basically about reducing loading hitches, second half about moving to modern GPU-driven rendering, useful even if you're not working with Unreal. youtu.be/WGv_BjxvJ8M?...

Interviewer: Can you explain this gap in your resume? Game engine programmer: alignment padding