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Arseny Kapoulkine @zeux.io · 8d

New blog post! In "Billions of triangles in minutes" we'll walk through hierarchical cluster level of detail generation of, well, billions of triangles in minutes. Reposts welcome!

zeux.io/2025/09/30/b...

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Arseny Kapoulkine @zeux.io · 16d

Yeah if you can process two triangles at once you can do this without weird offset math. However, for mesh shaders, certain *ahemd* vendors really want you to output one triangle per thread, so that option stops being appealing...

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Arseny Kapoulkine @zeux.io · 16d

Unlike Vulkan, DX12 doesn't support loading 8-bit types from byte address buffers; this seems like it would be a problem for working with 8-bit triangle indices, but don't worry, you can just

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Arseny Kapoulkine @zeux.io · 19d

~3m instead of ~4m now :) It's actually ~2m40s when not ran under the profiler for whatever reason.

While I *can* make the green bars completely solid I've already spent way longer than I should on this exercise so this will have to do!

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Arseny Kapoulkine @zeux.io · 23d

AMDVLK is dead, long live radv:

github.com/GPUOpen-Driv...

AMDVLK open-source project is discontinued · GPUOpen-Drivers AMDVLK · Discussion #416

In a move to streamline development and strengthen our commitment to the open-source community, AMD is unifying its Linux Vulkan driver strategy and has decided to discontinue the AMDVLK open-sourc...

github.com

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Arseny Kapoulkine @zeux.io · 25d

#ScreenshotSaturday

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Reposted by Arseny Kapoulkine

Ari Arnbjörnsson @flassari.bsky.social · 28d

Profile.

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Arseny Kapoulkine @zeux.io · Sep 2

Not just from tiny_ocl.h, no.

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Arseny Kapoulkine @zeux.io · Sep 2

I would recommend updating documentation as tiny_bvh requires C++17 now (thousands separators are C++14, static inline variables are C++17); this is not very obvious from the readme.

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Arseny Kapoulkine @zeux.io · Aug 26

It's kinda ironic: on one hand, it's probably enough; on the other hand, Epic had to write a custom compute micropoly rasterizer because it was in fact not enough :)

2080 had 6 GPCs @ 1.5 GHz, 5070 has 5 GPCs @ 2.3 GHz. So just in general fairly close, as long as they didn't increase tri/GPC rate.

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Arseny Kapoulkine @zeux.io · Aug 26

Obviously if I ran this on a 5090 I'd expect higher performance... and many more watts. But I don't have a 5090.

And probably from the architectural perspective, pure rasterization bottlenecks have been squeezed dry 7 years ago and there's not much else to do, and not much need - 19B/sec is enough

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Arseny Kapoulkine @zeux.io · Aug 26

So this suggests no progress in pure rasterization performance in... 7 years? In fact a noticeable regression in tri/sec/W.

Of course, when people say "rasterization", they usually mean modern ALU heavy rendering pipelines - not pure geometry stress test. Still!

Caveat: no 2080 to retest again :)

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Arseny Kapoulkine @zeux.io · Aug 26

... couple minor tweaks to meshlet function interfaces, as they were extremely experimental at the time. Everything else worked as is.
- Curiously, the commit log said it ran at ~19B tri/sec on RTX 2080. On my RTX 5070 now, I get ~17B tri/sec on the same mesh. 5070 is 250W, my 2080 was a 215W model.

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Arseny Kapoulkine @zeux.io · Aug 26

Spent some time resurrecting niagara from 2018 to test some NV_mesh_shader stuff. This was fun!

- The code almost compiles and runs... needed a couple SPIRV fixes to align with latest Vulkan SDK for some reason.
- This was using meshoptimizer v0.9 (17 versions ago!)
- Update to v0.25 needed a...

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Arseny Kapoulkine @zeux.io · Aug 23

Starting in ~20 minutes!

Arseny Kapoulkine @zeux.io · Aug 22

Upcoming niagara stream!

Tomorrow (Saturday, Aug 23) at 11 AM PST (6 PM GMT), we will talk about and work on simplifying Vulkan synchronization code, following recent developments in the ecosystem like unified layouts.

youtube.com/live/0rqWe1M...

niagara: Simplifying synchronization

YouTube video by Arseny Kapoulkine

youtube.com

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Arseny Kapoulkine @zeux.io · Aug 21

While it's quite silly to literally run the simplifier every frame on the UI thread in the browser, it's fun to see that it can indeed work at 60 FPS!

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Reposted by Arseny Kapoulkine

Jason Schreier @jasonschreier.bsky.social · Aug 21

BREAKING: Silksong will be out on September 4. Two weeks from today. Really.

Often, games that take 7+ years to make are plagued by mismanagement and painful burnout. But for Silksong? Team Cherry was having a blast. They still are.

This is their story: www.bloomberg.com/news/newslet...

Why ‘Silksong’ Took Seven Years to Make

The highly anticipated indie game has been in production for so long that it’s become an internet meme

www.bloomberg.com

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Arseny Kapoulkine @zeux.io · Aug 21

@akien.bsky.social Any sense as to the timeline of 4.5 release? Did not expect 2 months of betas 😅

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Arseny Kapoulkine @zeux.io · Aug 20

now I can finally relax a little 😩

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Arseny Kapoulkine @zeux.io · Aug 20

Same as in binary identical positions? That's guaranteed :)

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Arseny Kapoulkine @zeux.io · Aug 20

A standard VB/IB, so 6 topologically disconnected patches in one mesh if I understood your description correctly, with 3 copies of each corner vertex.

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Arseny Kapoulkine @zeux.io · Aug 20

Thanks to Valve for sponsoring most of the work on the core library in this release!

The documentation has seen significant further structural improvements in multiple sections and I'm now quite happy with it :) Give it a read if you haven't yet!

meshoptimizer.org

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Arseny Kapoulkine @zeux.io · Aug 20

... improvements to appearance by default and more non-simplification work!

gltfpack now supports permissive simplification as well as WebP texture compression support. See release notes for even more library & gltfpack changes.

GitHub stars and boosts are appreciated!

github.com/zeux/meshopt...

Release v0.25 · zeux/meshoptimizer

This release contains many improvements to the meshoptimizer library, with a particular focus on simplification algorithms, as well as several new gltfpack features. Highlights: New simplification...

github.com

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Arseny Kapoulkine @zeux.io · Aug 20

meshoptimizer v0.25 is out! Featuring new simplification function that optimizes positions and attributes for appearance, experimental permissive mode to simplify faceted regions with selective seam preservation, regularization option for improved tessellation quality and deformation, multiple ...

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