Nicolas Lopez

Float to R8_UNorm conversion has a permitted tolerance of 0.6ulp in the DX spec. 0.55/255 on some GPUs rounds down to 0 and on others rounds up to 1/255. Dangerous behavior when R8_UNorm NumFramesAccumulated=0 is used by a denoiser to mark invalid history... microsoft.github.io/DirectX-Spec...

[BLOG] A frame analysis of Dark Souls III
blog.simonrodriguez.fr/articles/202...

A detailed look at how the FromSoftware game renders a frame, with step-by-step comparisons and explanations.

I am happy to announce publication of my chapter titled "Real-Time Neural Network Implementation for GPUs" in GPU Zen 4 book, available now.

Chapter comes with full MIT-licensed source code, available on Github here: github.com/boksajak/MLP...

The book is available on Amazon.

I'd like to share @daqilin.bsky.social and I co-authored a chapter in the latest GPU Zen 4 book.

We cover the engineering details of implementing ReSTIR GI & PT in UE5's NvRTX branch, adopted in NVIDIA's Zorah project showcased at CES and GDC last year.

The book is now available on Amazon.

I've been working with Spherical Gaussians recently as a representation for irradiance in realtime raytracing.

Ended up deriving quite a few new approximations relating to SGs and diffuse lighting. Ended up with something both cheap and accurate. Check it out:

www.shadertoy.com/view/WX3fRB

GPU Zen 4: Advanced Rendering Techniques GPU Zen 4: Advanced Rendering Techniques [Engel, Wolfgang Friedrich, Reznikov, Laura, Bazhenov, Kirill, Lopez, Nicolas, Blanco, Victor] on Amazon.com. *FREE* shipping on qualifying offers. GPU Zen 4: Advanced Rendering Techniques

‪Available now on Amazon:‬
‪Standard Edition: a.co/d/0cvhJuSU ‬
‪Deluxe Edition: a.co/d/07t0MZGz%E...
‪Kindle version is coming‬

I didn’t know it existed!

Excited to share that GPU Zen 4: Advanced Rendering Techniques is officially out. This volume features work from some of the most visually impactful projects of recent years, including #AssassinsCreed , #DOOM , #StarwarsOutLaws and NVidia's Zorah. And a killer cover :)

Best bagels, our office is literally next street :D

Adventures in Neural Rendering In recent years, neural networks have started to find their way into many areas of rendering. While antialiasing and upscaling are probably the most well‑known uses, they’re far from the only ones—…

I’ve recently been tinkering with MLPs, exploring different ways they might be used in rendering to get a feel for their potential. I also put together a blog post with some initial impressions. interplayoflight.wordpress.com/2026/02/10/a...

Software occlusion culling in Block Game My GPU is the integrated Radeon Vega 8 that comes with my AMD Ryzen 7 5700G CPU. I tell you this so you know that my workstation is not a graphical computing powerhouse. It is, in fact, quite weak. To...

My blog post about how software rendered depth based occlusion culling in Block Game functions is out now! enikofox.com/posts/softwa...

#GameDev #ProcGen 🎮

I and the team had the chance to talk to @digitalfoundry about our port of #assassinscreedshadow including some behind the scene debug views

Assassin's Creed Shadows on Switch 2: The Making of an "Impossible Port" "All the investments we had in scalability really paid off."

How Ubisoft brought AC Shadows to Switch 2: "Some people called it an impossible port, and it can sound a bit impossible at the beginning... but the key is to understand the specificities of the GPU architecture."
www.digitalfoundry.net/features/ass...

No Graphics API — Sebastian Aaltonen Graphics APIs and shader languages have significantly increased in complexity over the past decade. It’s time to start discussing how to strip down the abstractions to simplify development, improve pe...

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".

“Obviously” :)

Congrats to you!

YouTube video by Digital Foundry Digital Foundry's Best Game Graphics of 2025 - PC/PS5/Xbox/Switch 2 - Another Amazing Year

#AssassinsCreedShadows named 2nd best looking game of 2025 by @digitalfoundry.
“Anvil at a super next-gen level” made me smile.
Countless hours of work behind this—very happy to see it recognized.

youtu.be/nZ7pc4M-Uuk?...

Huge congrats to #ClairObscurExpedition33! So proud to see a French game take the top spot. An absolutely stunning achievement, your work inspires so many of us. Bravo à toute l’équipe!

"Microbenchmarking NVIDIA’s Blackwell Architecture: An in-depth Architectural Analysis", focusing on the tensor cores arxiv.org/pdf/2512.02189

YouTube video by Wookash Podcast Anvil - Ubisoft’s engine workflow | Nicolas Lopez

It’s a good opportunity to know more about Anvil, the engine that powers #AssassinsCreed, and how we approach tech convergence at Ubi. I love this format. Thanks for the chat @gameengineering.bsky.social

youtu.be/vtxXt7E63bQ?...

Glad to see this fixed!

New blog post! Behind the scenes of some of the techniques involved in making our last PC demo 💫 gboisse.github.io/posts/this-i...

YouTube video by Wookash Podcast Dear ImGui | On UI Architecture with Omar Cornut

Łukasz from Wookash Podcast (@gameengineering.bsky.social) has posted a lengthy conversation I recorded with him a few weeks ago:
www.youtube.com/watch?v=2KPU...
It's really awkward for me to watch it so I'll assume it's just confused rambling :)

ReGIR - An advanced implementation for many-lights offline rendering tomclabault.github.io/blog/2025/re...

Inside NVIDIA GPUs: Anatomy of high performance matmul kernels - Aleksa Gordić From GPU architecture and PTX/SASS to warp-tiling and deep asynchronous tensor core pipelines.

"Inside NVIDIA GPUs: Anatomy of high performance matmul kernels", includes a great intro to GPU architecture and PTX/SASS: www.aleksagordic.com/blog/matmul

YouTube video by SIGGRAPH Advances in Real-Time Rendering RAY TRACING THE WORLD OF ASSASSIN'S CREED SHADOWS (Advances in Real-Time Rendering SIGGRAPH 2025)

Ray tracing The World of #AssassinsCreedShadows (Siggraph 2025) available on YouTube youtu.be/2K-rwy4aMmU?...

YouTube video by Neokineogfx Fixing C

This new video by Timothy Lottes will be the craziest way of programming you've seen for a long time. www.youtube.com/watch?v=RrL7...

I had 3 of those. They all failed me the same way.

Idk, but 40 looks closer to 60 than to 30 to me and this is wild