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Jonathan Stone

@sheriffstone.bsky.social
557 followers 182 following 24 posts

Lead Rendering Engineer, Materials and Shading at the Lucasfilm Advanced Development Group. Former graphics lead at Double Fine Productions. Music nerd.

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Jonathan Stone @sheriffstone.bsky.social · 26/09/2026
Thanks to our colleagues at Pixar, NVIDIA, SideFX, OTOY, Blender, and Autodesk for their amazing work on this year's MaterialX and OpenPBR Virtual Town Hall. The full slide deck can be found at materialx.org/assets/ASWF_..., and stay tuned for the published video from the @aswf.io.
The MaterialX Teapot and LionThe MaterialX Stirling
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Academy Software Foundation (ASWF) @aswf.io · 16/09/2026
NVIDIA has contributed two new high-fidelity assets—the MaterialX Teapot and Lion—to DPEL. These are the first DPEL assets to feature production-grade, multi-layered MaterialX materials. Learn more and get the assets: www.aswf.io/blog/materia...
aswf.io
DPEL Adds New MaterialX Assets from NVIDIA – ASWF
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Academy Software Foundation (ASWF) @aswf.io · 11/09/2026
Our annual virtual town halls kick off next week with MaterialX and OpenPBR on Tuesday at 10:00 am PT! 🎬✨ Join TSC members & contributors from Lucasfilm, Autodesk, Pixar, NVIDIA, SideFX, Blender, and OTOY for milestones, roadmap updates, and live Q&A. Register: ASWF.io/virtualtownhalls
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Jonathan Stone @sheriffstone.bsky.social · 06/06/2026
The MaterialX PBR specification is gaining formal mathematics! This proposal adds scattering equations for each BSDF, EDF, and VDF, so that renderers can implement shading nodes directly from the spec. Feedback and review from the rendering community are very welcome: github.com/AcademySoftw...
github.com
Initial scattering equations for the PBR specification by jstone-lucasfilm · Pull Request #2964 · AcademySoftwareFoundation/MaterialX
This changelist expands the MaterialX PBR specification with the formal mathematical foundations of its shading nodes, so that the behavior of each BSDF, EDF, and VDF can be reproduced directly fro...
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MaterialX @materialx.bsky.social · 22/05/2026
MaterialX v1.39.5 is released! This release of MaterialX has the largest set of contributors in the history of our project, and includes support for the Slang shading language, 2D and 3D flake nodes, improvements to the MaterialX Graph Editor, and much more. github.com/AcademySoftw...
A blue paint flake material on a sphereA purple tinted glass material on a shading ballA procedural marble graph in the MaterialX Graph Editor
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I3D Symposium @i3dsymposium.org · 15/05/2026
Naty Hoffman just wrapped up a career-spanning keynote on lessons learned from game development and beyond. Now underway: a fireside chat with Naty Hoffman and Eric Haines, joined by Omer Shapira - celebrating two remarkable careers in computer graphics. #I3D2026
Naty Hoffman's Keynote in I3D 2026A fireside chat with Naty Hoffman and Eric Haines, joined by Omer Shapira
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Academy Software Foundation (ASWF) @aswf.io · 08/05/2026
This year's Google Summer of Code includes two ASWF projects within Blender: MaterialX and OpenTimelineIO. Stay tuned for the results!   summerofcode.withgoogle.com/programs/2026/organizations/blender-foundation #OpenSource #Blender #GSoC #ASWF #MaterialX #OpenTimelineIO #VFX #Animation"
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Academy Software Foundation (ASWF) @aswf.io · 05/05/2026
If you've ever wanted to contribute to open source VFX software but didn't know where to start: Dev Days is made for you! Join us on May 14 or September 17 for ASWF Dev Days. Pick a project, get paired with mentors, and make a real contribution in one day 👉 bit.ly/49cSk6U #DevDays #VFX #Animation
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MaterialX @materialx.bsky.social · 19/04/2026
We're very happy to announce that the first release candidate for MaterialX v1.39.5 is officially tagged, and you can find the full changelog at the link below. We look forward to hearing about your experiences, and happy testing! github.com/AcademySoftw...
github.com
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Academy Software Foundation (ASWF) @aswf.io · 09/04/2026
Are you interested in a technical career in VFX or 3D Animation? Apply for the #ASWF Summer Learning program by April 18! The 8-week mentorship is 100% remote and open to all experience levels. Learn more and apply at www.aswf.io/summer-learn...
aswf.io
Summer Learning Program (SLP) – ASWF
SLP graduates have gone on to pursue technical careers at DreamWorks, Sony Interactive Entertainment, Epic Games, Jellyfish Animation, Microsoft, AWS, Technicolor Creative Studios, and more.
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Academy Software Foundation (ASWF) @aswf.io · 16/09/2025
ASWF #DevDays is next week! Join developers from around the world on Sept. 25 by picking a task from an #ASWF project, including that can be completed in one day. All levels of experience are welcome! Find out more and sign up to participate at www.aswf.io/dev-days. @materialx.bsky.social
aswf.io
Dev Days 2025 - ASWF
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MaterialX @materialx.bsky.social · 15/09/2025
MaterialX v1.39.4 has been released! This version adds support for WebGPU Shading Language, hex-tiled and lat-long images, NanoColor spaces, 2D fractals, animated materials, and many contributions from our participants in ASWF Dev Days 2025. github.com/AcademySoftw...
A real-time render of the hex-tiled onyx example from the MaterialX project.
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Academy Software Foundation (ASWF) @aswf.io · 04/09/2025
Our next virtual #DevDays is coming up Sept. 25! Spend a day contributing to one of the #ASWF projects and supporting the software our industry relies on. Find out more and sign up at www.aswf.io/dev-days/!
aswf.io
Dev Days 2025 - ASWF
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Stephen Hill @selfshadow.com · 10/08/2025
Most of the slides and course notes for the SIGGRAPH 2025 Physically Based Shading in Theory and practice course are now online, with more to follow: blog.selfshadow.com/publications...
blog.selfshadow.com
SIGGRAPH 2025 Course: Physically Based Shading in Theory and Practice
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Jonathan Stone @sheriffstone.bsky.social · 07/08/2025
Thanks to our colleagues at Autodesk, IKEA, NVIDIA, OTOY, and Pixar Animation Studios for their amazing work on the MaterialX and OpenPBR Virtual Town Hall for @aswf.io Open Source Days 2025. The full slide deck can be found at materialx.org/assets/ASWF_...
The MaterialX Chess Set in OctaneRender 2026.1.The MaterialX Lama Stirling with MaterialX BSDF layers in RenderMan XPU.
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Academy Software Foundation (ASWF) @aswf.io · 05/08/2025
We're excited to share #OpenPBR Volume, a new collaboration between Autodesk and Sidefx to create an open standard enabling users to define the look of volumetric assets. OpenPBR is a subproject of @materialx.bsky.social. Read more: www.aswf.io/blog/openpbr...
aswf.io
Announcing OpenPBR Volume! - ASWF
OpenPBR Volume is a new collaboration between Autodesk and SideFX to create a common model for defining the look of volumetric assets.
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SniperJake945 @tearsofjake.bsky.social · 29/07/2025
New at #SIGGRAPH2025: Can we make Perlin Noise stretch along some underlying vector field? Well it turns out it's possible with two simple additions to the original method! No need for advection or convolutions. Find the paper and implementations here: github.com/jakericedesi...
Anisotropic perlin noise on Suzanne
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Jonathan Stone @sheriffstone.bsky.social · 02/08/2025
Join us on August 5th for the MaterialX Virtual Townhall at ASWF Open Source Days 2025, featuring presentations from Autodesk, IKEA, Lucasfilm, NVIDIA, OpenPBR, OTOY, and Pixar. events.linuxfoundation.org/open-source-...
The MaterialX Chess Set in OctaneRender 2026.1.The MaterialX Lama Stirling with MaterialX BSDF layers in RenderMan XPU.
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Animation World Network @animationworld.bsky.social · 01/08/2025
#LAIKA Joins the #AcademySoftwareFoundation - award-winning #animation studio and longtime contributor to the MaterialX project, and #OpenUSD Working Group plans to help expand the organization’s mission and learning programs. bit.ly/40Iu6NN #Stopmotion #3Dprinting #AnimationWorld #VFXWorld
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MaterialX @materialx.bsky.social · 24/07/2025
We've just marked the first release candidate for MaterialX v1.39.4 on GitHub, and we'd love to get feedback from teams with MaterialX and USD integrations. The tag for the release candidate is v1.39.4-rc1, and you can read more about the new features and updates at github.com/AcademySoftw...
github.com
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MaterialX @materialx.bsky.social · 13/07/2025
Join us on August 5th for the MaterialX and OpenPBR Virtual Townhall at ASWF Open Source Days 2025, featuring presentations from Autodesk, IKEA, Lucasfilm, NVIDIA, OTOY, and Pixar RenderMan. events.linuxfoundation.org/open-source-...
events.linuxfoundation.org
Virtual Townhalls | LF Events
Leading up to our main program on August 10, we will be holding a series of virtual town halls for Academy Software Foundation projects including MaterialX, OpenCue, OpenColorIO, Open RV, among others...
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Academy Software Foundation (ASWF) @aswf.io · 09/07/2025
We're excited to announce that our keynote for Open Source Days 2025 will be delivered by the Academy Award®-winning ‘Flow’ filmmaking team! Join us for free on August 10 (in-person or virtually) for that and much more! Full schedule and registration details on our blog: www.aswf.io/news/open-so...
aswf.io
Open Source Days 2025 Keynote to be Delivered by Academy Award®-winning ‘Flow’ Filmmaking Team - ASWF
The Academy Software Foundation has announced the program for its annual Open Source Days event taking place August 4-11, which will include a keynote talk by the filmmaking team who worked on the ani...
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Jonathan Stone @sheriffstone.bsky.social · 25/06/2025
Congratulations to Alain Hostettler on a great talk at HPG 2025, including the announcement of a Pixar/Lucasfilm collaboration on the MaterialX Physically Based Shading nodes in RenderMan XPU! www.youtube.com/watch?v=md6S...
youtube.com
HPG 2025: Day 2 - June 24th
YouTube video by High-Performance Graphics
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Jonathan Stone @sheriffstone.bsky.social · 23/06/2025
The HPG 2025 Conference starts tomorrow, and I'm looking forward to the MaterialX talk from my ILM colleague Alain Hostettler, the RenderMan XPU talk from Pixar, and the Slang talk from @shannonin3d.bsky.social. highperformancegraphics.org/2025/program...
highperformancegraphics.org
High-Performance Graphics 2025
High-Performance Graphics 2025 - June 23-25 Copenhagen
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Stephen Hill @selfshadow.com · 10/06/2025
The SIGGRAPH Physically Based Shading course is back this year: blog.selfshadow.com/publications...
blog.selfshadow.com
SIGGRAPH 2025 Course: Physically Based Shading in Theory and Practice
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Jonathan Stone @sheriffstone.bsky.social · 03/05/2025
This was a really fun conversation on MaterialX, glTF, and OpenUSD at the Metaverse Standards Forum last week, and I thought I'd share it here for interested folks. www.youtube.com/watch?v=m-bE...
youtube.com
Material Convergence - Material, glTF, and USD
YouTube video by Metaverse Standards Forum
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Pixar's OpenUSD @openusd.bsky.social · 02/05/2025
One update we want to celebrate in USD 25.05 is having MaterialX v1.39.3 -- which includes OpenPBR Surface and the Chiang Hair BSDF -- as the new default MatX version. 🎉 Thank you for the close collab @materialx.bsky.social! 💖 We're excited to see the cool things folks create with this combo!
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Metaverse Forum @metaverse-standards.org · 24/04/2025
Join the 3D Asset Interoperability Working Group on April 30th for the education session, Material Convergence - MaterialX, glTF, and USD with Jonathan Stone and Ed Mackey. All members are welcome! Not a member? Join us - metaverse-standards.org/members/ #glTF #MaterialX #USD
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Jonathan Stone @sheriffstone.bsky.social · 21/04/2025
Happy twentieth to the Psychonauts crew, an amazing game team that I remain deeply proud to have worked alongside. Thanks to @timoflegend.bsky.social, @erikrobson.net, @doubleanna.bsky.social, @keescheese.bsky.social, @scottlava.bsky.social, and the rest of this brilliant band of troublemakers.
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Academy Software Foundation (ASWF) @aswf.io · 21/04/2025
Are you interested in contributing to an #ASWF project but don't know where to start? Join us on May 15 for #DevDays and spend one day learning about a project, benefiting from the mentorship of project leaders, and of course writing code! Register at devdays.aswf.io.
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Academy Software Foundation (ASWF) @aswf.io · 10/04/2025
The call for presentations for #ASWF Open Source Days is now open until May 18! We are expecting a full house again this year with 250+ software engineers from across the motion picture industry. Submit your talk at aswf.io/opensourcedays
aswf.io
Open Source Days | LF Events
Open Source Days, by the Academy Software Foundation, is the leading event for open source in VFX, animation, and digital content creation.
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JCGT announcements @handle.invalid · 31/03/2025
EON: A practical energy-preserving rough diffuse BRDF; by Portsmouth, Kutz, and Hill. www.jcgt.org/published/00...
Lambert model (left), the classic “qualitative” Oren–Nayar QON model (center), and our new EON model (right), all at maximal roughness and the same single-scattering albedo color. The top and bottom rows show front and side-lit cases respectively. The EON model compensates for the energy loss of the QON model, producing similar brightness to the Lambert model combined with the characteristic “flattening” and enhanced backscattering of the Oren–Nayar model.
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Pablo Delgado @pablode.bsky.social · 11/03/2025
Implemented USD point instancer primvar support in my toy renderer the last few days. Can now render this 2D Gaussian Splatting (2DGS) scene with a single mesh & MaterialX material. (Created by Oliver Markowski with Houdini, link see below ⬇️)
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Academy Software Foundation (ASWF) @aswf.io · 10/03/2025
Did you know that many of the Academy Award winners and nominees used open source software? Learn more about some of the open source tools used on films like Flow and The Wild Robot at www.aswf.io/blog/this-ye... #ASWF #opensource #VFX #animation
aswf.io
This Year’s Hollywood Awards Season was Powered by Open Source - ASWF
Open source software contributed to the making of award winning films like Flow, Dune: Part Two, The Wild Robot, Inside Out 2 and Moana 2.
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Jonathan Stone @sheriffstone.bsky.social · 08/03/2025
Although it’s a small set of updates, I’m particularly proud of this latest release because it resulted from a collaboration between the @openusd.bsky.social and @materialx.bsky.social projects, with the goal of making MaterialX v1.39.3 the new default in USD 25.05.
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MaterialX @materialx.bsky.social · 13/02/2025
We're proud to welcome our parent organization, @academyswf.bsky.social, to Bluesky, and we hope you'll follow them if you're interested in related projects such as OpenEXR, OpenColorIO, and Open Shading Language!
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Angela Watercutter @waterslicer.bsky.social · 10/02/2025
NEW: Want to know how Kendrick Lamar's incredible Super Bowl halftime show came together? I got the scoop for you. www.wired.com/story/true-s...
wired.com
The Wild True Story Behind Kendrick Lamar’s Super Bowl Halftime Show
From the start, Kendrick Lamar wanted to turn his life into a video game for his big Super Bowl halftime show. The team tasked with doing that knew what to do—right down to sourcing a vintage GNX.
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Jonathan Stone @sheriffstone.bsky.social · 21/01/2025
Highlighting one of the key contributions in MaterialX v1.39.2, Masuo Suzuki at NVIDIA contributed the Chiang Hair BSDF, seen below in NVIDIA RTX, which opens the door to the authoring of cross-platform, customizable hair shading models in MaterialX and OpenUSD. github.com/AcademySoftw...
Three different examples of the Chiang Hair BSDF in MaterialX v1.39.2, rendered in NVIDIA RTX.
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MaterialX @materialx.bsky.social · 21/01/2025
MaterialX v1.39.2 has been released! This version adds support for the Chiang Hair BSDF, Disney Principled shading model, generic color ramps, improved Worley noise, shader generation optimizations, and contributions from our participants in ASWF Dev Days 2024. www.aswf.io/blog/materia...
aswf.io
MaterialX v1.39.2 Now Publicly Available - ASWF
The Academy Software Foundation is excited to announce the release of MaterialX v1.39.2, introducing support for the Chiang Hair BSDF, Disney Principled shading model, generic color ramps, improved Wo...
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MaterialX @materialx.bsky.social · 10/01/2025
The first release candidate for MaterialX 1.39.2 has been marked on GitHub, and we're encouraging teams to test it out over the next week. The tag for this release candidate is v1.39.2-rc1, and the latest changelog may be found at github.com/AcademySoftw...
github.com
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Julien Gachadoat @julienv3ga.bsky.social · 06/01/2025
It took me a while but I finally finished to recode the 300 programs of Jean-Paul Delahaye’s book "Nouveaux dessins géométriques et artistiques" with p5js. The book was published in 1985 and features classic generative algorithms. github.com/v3ga/nouveau...
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MaterialX @materialx.bsky.social · 03/12/2024
Congratulations to our colleagues at OTOY for this initial preview of MaterialX support in Octane Render 2026.1: render.otoy.com/forum/viewto...
The Open Chess Set and MaterialX UI examples in a preview of Octane Render 2026.1
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Jonathan Stone @sheriffstone.bsky.social · 23/11/2024
Highlighting this post from @shannonin3d.bsky.social, we're very interested in the possibilities for Slang in MaterialX, where it could be used to harmonize node implementations across GLSL, HLSL, MSL, WGSL, and other hardware shading languages. shader-slang.com/blog/2024/11...
shader-slang.com
There’s a lot going on with Slang!
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Jonathan Stone @sheriffstone.bsky.social · 20/11/2024
It would be amazing to see the computer graphics community engage on Bluesky, so here's a starter pack for those who might be interested in joining in: go.bsky.app/K8ZL1kq
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Jonathan Stone @sheriffstone.bsky.social · 14/11/2024
I wanted to highlight this recent proposal from Masuo Suzuki at NVIDIA, adding support for Mikkelsen's classic Hex-Tiling technique in MaterialX. We'd love some feedback from the graphics community on this proposal! github.com/AcademySoftw...
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Jonathan Stone @sheriffstone.bsky.social · 14/09/2024
For any developer who is interested in contributing to an Academy Software Foundation project, perhaps for the first time, I wanted to highlight ASWF Dev Days 2024, which will take place on September 26-27. We hope to see you there! www.aswf.io/blog/devdays...
aswf.io
Join us for Dev Days 2024 Next Month! - ASWF
Sign up now for ASWF Dev Days, a two-day virtual hackathon which helps individuals to make their first contribution to a project.
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Charmaine Chan @charmainesmchan.bsky.social · 18/05/2023
I'm so excited for y'all to see #TheCreator. We've been secretly working w/ Gareth Edwards along w/ Prod Designer James Clyne & photography from Greig Fraser & Oren Soffer. I'm extremely proud of this as it's my 1st time being VFX Supervisor w/ the ILM dream team! youtu.be/573GCxqkYEg
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