Hsueh-Ti Derek Liu

PhD student, Computer Science, University of Toronto

[Keenan Crane @keenanisalive]

If anyone's interested in what I've been up to lately, I've been leading development of some 3D foundation models at @Roblox—like a next-gen texture generator, released today: https://t.co/YVpMG1Y0Jp

4k resolution, PBR materials… and it's free. :-)

Also gets some things right that are important in practice (and annoying with other tools), like generating good texture even in spots where different parts of the mesh intersect.

Was happy this required not just ML, but some classic signal processing to really get right. Great work, by a great team.

Has definitely been a journey of understanding how generative AI tools can be designed as just another level of abstraction for creation—rather than a “one shot” replacement for artists. Still a lot of work to do, and more to come…

[Roblox Creators @RobloxCreators]

Texture Generation now goes beyond color. Quality mode, now in beta, generates 4K PBR textures with color, roughness, and metalness maps right in Studio. Link below.

[Angela Dai @angelaqdai]

📢ProcGen3D: Learning Neural Procedural Graphs for Image-to-3D Reconstruction

@xinyi092298 learns neural procedural graphs to generate high-fidelity 3D - MCTS-guided sampling maintains consistency with the input image, even from real images!
Check it out: https://t.co/RLGd2iXCwf

[Hsueh-Ti Derek Liu @HTDerekLiu]

Hooooray 🙌 Massive kudos to everyone behind it. It’s more than thrilled to see a topic so close to my heart — LOD — evolve from R&D, to prototype, and to a part of SLIM, in the hands of millions of Roblox users everyday!

[David Baszucki @DavidBaszucki]

SLIM (Scalable Lightweight Interactive Models) is live in Studio Beta, bringing us one step closer to our vision of massive high-fidelity worlds that run on any device. SLIM automatically creates composite 3D assets in the cloud for complex models, and then auto-renders a lightweight version. https://t.co/rUlw0zaIG7

[Peter Yichen Chen @peterchencyc]

Join us at the SIGGRAPH Canada Party hosted by @HTDerekLiu and me, on behalf of Canada Graphics Research! RSVP here: https://t.co/9lkA6K2YhA #SIGGRAPH2025

[Nick Sharp @nmwsharp]

Logarithmic maps are incredibly useful for algorithms on surfaces--they're local 2D coordinates centered at a given source.

@yousufmsoliman and I found a better way to compute log maps w/ fast short-time heat flow in "The Affine Heat Method" presented @ SGP2025 today! 🧵

[Skal @PascalMassimino]

Light version of @PierreTerdiman 's Zero-Byte-BVH here:
https://t.co/VFIBa4bkCx

The idea is to order the triangles as a binary tree by groups of 6 triangles, each group defines a bounding box to test. If hit, recurse both half of the remaining triangles.
@DaKangz : WebGPU!

[Hsueh-Ti Derek Liu @HTDerekLiu]

@seleniumlzh @merlin_ND @_AlecJacobson @nmwsharp Can't wait to give it a try!!

[Selena Ling 凌子涵 @seleniumlzh]

Our #Siggraph25 work found a simple, nearly one-line change that greatly eases neural field optimization for a wide variety of existing representations.

“Stochastic Preconditioning for Neural Field Optimization” w/ @merlin_ND @_AlecJacobson @nmwsharp

[Nicole Feng @nicolefeng_]

I've updated my blog post to walk through the remaining technical details of our Surface Winding Numbers algorithm: now the calculus of the algorithm is explained a bit more in detail.

The post, paper, code, etc. is all here: https://t.co/SMZjWq41f5

[Keenan Crane @keenanisalive]

After many years of giving talks, I no longer get nervous.

Instead, I'm now nervous when my students give talks!

Fortunately, they do an amazing job.

Here's @MarkGillespie64 giving an extended talk on a new *harmonic* surface representation:

https://t.co/Ky9vTVX9Ix

[Hsueh-Ti Derek Liu @HTDerekLiu]

@taiyasaki @kwangmoo_yi So excited to see this coming out!!

[Andrea Tagliasacchi @taiyasaki]

📢📢📢 "𝐑𝐚𝐝𝐢𝐚𝐧𝐭 𝐅𝐨𝐚𝐦: Real-Time Differentiable Ray Tracing", a mesh-based 3D represention.

https://t.co/wcI6Xj6UHR
https://t.co/JOzRTfkgbl

Co-lead by my PhD students Shrisudhan Govindarajan and Daniel Rebain, and w/ @kwangmoo_yi

[Keenan Crane @keenanisalive]

My superstar student @MarkGillespie64 is on the academic job market 🤩: https://t.co/RkIdE8v57m

Beyond lots of beautiful, deep, award-winning research in geometry processing, he's just a terrific person who we already miss having around.

Twist his arm if you want him to apply!

[Tianchang Shen @TianchangS]

Generating nice meshes in AI pipelines is hard. Our #SIGGRAPHAsia2024 paper proposes a new representation which guarantees manifold connectivity, and even supports polygonal meshes -- a big step for downstream editing and simulation. (1/N)

SpaceMesh: https://t.co/dKdgVWxz8V

Joint work with @mli0603 @MarcTLaw @matanatzmon @FidlerSanja @james_r_lucas @JunGao33210520 @nmwsharp (1/n)

[Nicole Feng @nicolefeng_]

Signed distance functions (SDFs) are fundamental tools in graphics, vision, and physics simulation.

But how do you get a high-quality SDF from messy, real-world input? At #SIGGRAPH2024, we introduced a simple method for turning "broken" geometry into a well-behaved SDF. <🧵>

[Rohan Sawhney @rohansawhney1]

🔍Need efficient distance queries for 2D/3D meshes?

Check out FCPW – a user-friendly library in C++ and Python with GPU support! 💻

Get started here: https://t.co/Q36n1kq1VI

Also available on PyPI: pip install fcpw🐍

[Hsueh-Ti Derek Liu @HTDerekLiu]

@rohansawhney1 Wow this is awesome!! Does this support triangle to triangle distance queries?

[Hsueh-Ti Derek Liu @HTDerekLiu]

Super excited to share the new Roblox Graduate Fellowship program, a 2-year fellowship for PhD students in graphics, machine learning, communications, systems, data science, and economics. The application deadline is August 15, 2024!!

https://t.co/ESiikMlSSH

[Vismay Modi @vm2358]

(1/n) Happy to share that our paper, "Simplicits: Mesh-Free, Geometry-Agnostic, Elastic Simulations" will be presented at #SIGGRAPH2024

https://t.co/TxApBUNTcH