Josef Spjut
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josefspjut.bsky.social
Josef Spjut
@josefspjut.bsky.social
My thought about computers.
It's close to intern recruiting season. Do any of my professor friends have PhD students they'd recommend for working on my team at NVIDIA?

Ask here if you want more info about what our team is working on.
August 26, 2025 at 6:37 PM
Reposted by Josef Spjut
Worth watching presentation, also provides some background info on how ReSTIR came to be and where it is heading: "ReSTIR: Traveling the Path of Reuse" www.youtube.com/watch?v=MRg9...
I3D 2025 Chris Wyman's Keynote "ReSTIR: Traveling the Path of Reuse"
YouTube video by I3D Symposium
www.youtube.com
July 31, 2025 at 12:20 PM
Reposted by Josef Spjut
Hands-on Class: Introduction to Slang
Sunday, 10 August 2025
4:00pm - 5:30pm PDT

This session will get you writing Slang shaders within the first few minutes! (2/6)

s2025.conference-schedule.org/presentation...
Presentation - SIGGRAPH 2025 Conference Schedule
s2025.conference-schedule.org
July 31, 2025 at 6:30 PM
Yet another case of popular media misrepresenting science. Yet it’s too much work for the average person to read the underlying paper/research.
THIS IS NOT WHAT THE PAPER SAYS

NOT EVEN CLOSE

NOT EVEN IN THE SAME UNIVERSE

NOT EVEN IN A PARALLEL MULTIVERSE
If you use chatgpt you're stupid. It's confirmed
June 30, 2025 at 6:22 AM
Reposted by Josef Spjut
THIS IS NOT WHAT THE PAPER SAYS

NOT EVEN CLOSE

NOT EVEN IN THE SAME UNIVERSE

NOT EVEN IN A PARALLEL MULTIVERSE
If you use chatgpt you're stupid. It's confirmed
June 21, 2025 at 12:21 AM
Reposted by Josef Spjut
Stolen from Discord
June 26, 2025 at 4:25 AM
Reposted by Josef Spjut
I am glad to attend #HPG2025 where I just presented our paper "Fused Collapsing for Wide BVH Construction", co-authored with Mathias Paulin. We propose a fast build algorithm for wide BVHs that directly computes a wide hierarchy without additional collapsing pass. Webpage: wbrbr.org/publications...
Fused Collapsing for Wide BVH Construction
wbrbr.org
June 23, 2025 at 5:27 PM
As a follow-up to our 2022 publication, we share additional user study results on monitor size for #FPS #gaming from the Foundations of Digital Games conference. dl.acm.org/doi/full/10....
Toward Understanding Display Size for FPS Esports Aiming | Proceedings of the 20th International Conference on the Foundations of Digital Games
dl.acm.org
June 8, 2025 at 2:48 AM
Reposted by Josef Spjut
An update, a bit of retrospection, and a call for you, yes, you, to help JCGT a bit: www.realtimerendering.com/blog/jcgt-is...
JCGT is moving along | Real-Time Rendering
www.realtimerendering.com
May 16, 2025 at 5:34 PM
Reposted by Josef Spjut
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...
HPG 2022 Keynote: The Journey to Nanite - Brian Karis, Epic Games
YouTube video by High-Performance Graphics
www.youtube.com
May 14, 2025 at 9:36 PM
In our recent work we saw perceptual improvement all the way up to 500 Hz expressed as Quality of Experience in a Unity FPS game. We also saw score increase until it appeared to saturate around 100 Hz in this game. #esports #research

dl.acm.org/doi/abs/10.1...
Pushing the Limits? Frame Rate Benefits to Players for up to 500 Hz in First Person Shooter Games | Proceedings of the 35th Workshop on Network and Operating System Support for Digital Audio and Video
dl.acm.org
April 8, 2025 at 6:56 PM
I've decided to mostly post my research updates to LinkedIn. Finding someone's LinkedIn feed is a bit tricky, so here's a direct link to mine.
www.linkedin.com/in/josefspju...
LinkedIn Login, Sign in | LinkedIn
Login to LinkedIn to keep in touch with people you know, share ideas, and build your career.
www.linkedin.com
April 8, 2025 at 6:53 PM
Reposted by Josef Spjut
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...
highperformancegraphics.org
March 17, 2025 at 9:17 PM
Reposted by Josef Spjut
Interesting to see a bit of details behind the amazing DLSS tech: research.nvidia.com/labs/adlr/DL...
DLSS 4: Transforming Real-Time Graphics with AI
research.nvidia.com
March 13, 2025 at 10:14 PM
Reposted by Josef Spjut
March 9, 2025 at 2:55 PM
Reposted by Josef Spjut
Just 2 weeks until our #GDC25 talk "Path Tracing Nanite in NVIDIA Zorah". I'm excited to talk about how we're ray tracing insanely detailed Nanite geometry in real-time.

Add it to your schedule and come say hi: schedule.gdconf.com/session/path...
March 5, 2025 at 7:57 PM
Reposted by Josef Spjut
If your XR/HCI related paper didn’t make it to the CVPR main track, I highly encourage you to resubmit with corrections to the CV4MR workshop. To improve your chances, you can optionally submit the CVPR reviews and how you addressed the issues pointed out in the reviews.

Contact me for questions!
📯CALL FOR PAPERS: Submit work to the Workshop on Computer Vision for Mixed Reality @ CVPR 2025!

📆 Deadline: March 28 → Papers appear in the CVPR Workshop Proceedings

✨ Topics: 3D/Image/Audio Capture/Understanding/Reconstruction, Spatial AI Agents, Human-AI Interaction.

cv4mr.github.io
February 26, 2025 at 7:37 PM
Reposted by Josef Spjut
TinyBVH 1.4.1 is now available on Github. Changes:
* Fast BVH8_CPU layout, 48% faster single rays
* And: A quantized (128 byte) version of the same, sadly not faster (yet)
* Customizable c_int, c_trav in BVHBase
* Improved memory efficiency of CWBVH
Get it here:
github.com/jbikker/tiny...
GitHub - jbikker/tinybvh: Single-header BVH construction and traversal library.
Single-header BVH construction and traversal library. - jbikker/tinybvh
github.com
February 28, 2025 at 8:35 AM
Reposted by Josef Spjut
VFX friends affected by the Technicolor closure: I’ve been there. I’m so sorry.

If you want help planning a pivot from VFX to other graphics-related fields, I have time to give you advice and connections.

Email me: info @ my username dot com.
February 24, 2025 at 3:33 PM
Reposted by Josef Spjut
Also wrote about the John Oliver episode and how it was basically a much funnier, more well produced version of a bunch of Techdirt articles from recent years. www.techdirt.com/2025/02/24/j...
John Oliver’s Content Moderation Episode Isn’t Just Funny — It’s Absolutely Accurate
Here was a fun surprise last night. John Oliver just delivered what might be the most accessible and accurate mainstream takedown of content moderation myths we’ve seen yet. The latest episod…
www.techdirt.com
February 24, 2025 at 10:34 PM
Reposted by Josef Spjut
TinyBVH 1.3.8 is now available on the main branch. This is a maintenance release, which restores most of the NEON functionality by @wuyakuma:
* A fast binned SAH BVH builder, on par with the AVX builder;
* Fast traversal kernels for the BVH4_CPU layout.
github.com/jbikker/tiny...
GitHub - jbikker/tinybvh: Single-header BVH construction and traversal library.
Single-header BVH construction and traversal library. - jbikker/tinybvh
github.com
February 20, 2025 at 9:23 AM
Reposted by Josef Spjut
I'm thrilled to share a new JCGT paper, "GPU Friendly Laplacian Texture Blending." It uses simple image processing and computational photography techniques to smoothly blend/layer textures and materials while preserving local contrast and texture details without ghosting or over-blurring. 1/3
GPU Friendly Laplacian Texture Blending
jcgt.org/published/00...
February 19, 2025 at 6:00 PM
Reposted by Josef Spjut
Welcome to JCGT-announce! We announce articles for the Journal of Computer Graphics Techniques here. If you prefer to get announcements sent to your email, sign up at jcgt.org/read.html
Journal of Computer Graphics Techniques
jcgt.org
February 11, 2025 at 6:53 PM
Reposted by Josef Spjut
🎖️ Ziyang Chen's work has won the honorable mention award at SIGGRAPH Asia 2024. For more details on Ziyang's work, consider visiting:

complightlab.com/publications...
SpecTrack: Learned Multi-Rotation Tracaking via Speckle Imaging - Computational Light Laboratory at University College London
Computational Light Laboratory at University College London
complightlab.com
February 6, 2025 at 12:21 PM