jwtstone @jwtstone Twitter profile | Pikagi

Pikagi

jwtstone

@jwtstone

1,467

Followers

583

Following

52

Media

1,393

Statuses

Graphics Programmer. I like vertices and pixels.

Shanghai, China

https://t.co/XQltrms4ZK

Joined December 2018

Don't wanna be here? Send us removal request.

Pinned Tweet

@jwtstone

jwtstone

2 months

Implemented the basic workflow for the new lineart renderer... I decided to release it before the end of this year, and till that time, I won't do any research but to improve the stability and user interfaces. Please comment below if you want any features :)

26

229

2K

Last Seen Profiles

@HongAnhQuc16

@jiroh_s02

@TheFire93

@freddyeyes

@VilleDeToulon

@BDesniar

@ThaMan84567151

@ThaMan84567151

@AElg3edy

@ThaMan84567151

@TheOneSaltine

@elk

@XI_Research

@gfggghghghyh

@penyukastw21

@MarianSwain

@Ha_Ha1213

@TheOneSaltine

@ThaMan84567151

@TheOneSaltine

@RxAllyBKiv6NEms

@alphaz_rin

@TheOneSaltine

@stw_pdg

@CarmelowReed

@CryptoPaultw

@TheOneSaltine

@BinorRaja

@bokeplokalmalam

@TheOneSaltine

@kucoincom

@jandakembangstw

@stwmaniax

@vtpoli

@hujja00

@yetty04

@jwtstone

jwtstone

3 months

How should curve change its width/color in animations? Drawings/Manga use heavily stylized lines a lot, while most anime avoid this to reduce the work. I've been thinking for years, but still confused... I could match/track the curves, but how to make it visually appealing?

22

116

1K

@jwtstone

jwtstone

1 year

Real-time, GPU-driven, 3D Contour Curves, both visible & hidden lines. Once I couple this with contour-adaptive remeshing and my old 2D contour curve algorithm, this will be the most powerful lineart renderer ever existed.

19

133

955

@jwtstone

jwtstone

4 months

I hope this works

11

47

663

@jwtstone

jwtstone

3 months

Tracking contour curves on moving surfaces is vital for generating coherent animated line art. The sweeping lines indicate the matching process on dynamically tessellated surfaces in real-time. Although I hesitated about a GPU algorithm, it seems to work (I hope so🥺).

3

27

282

@jwtstone

jwtstone

2 years

Real-time, fully GPU-driven method to extract curves from mesh contour (silhouette). It's not done yet. I've been working on temporal coherency of animated stroke curves for a year. Hope someday we can render truly expressive line animations in real-time.

Tweet media one

7

41

226

@jwtstone

jwtstone

7 months

real-time GPU remeshing, a byproduct of my crazy lineart research.

Tweet media one

3

3

63

@jwtstone

jwtstone

6 months

A little peek at current progress. The cusp detection is almost done. After segmenting curves based on visibility, I think this lineart renderer beats any competitor in the market. Further effort will be put into temporal coherence on animations.

Tweet media one

Tweet media two

Tweet media three

4

2

35

@jwtstone

jwtstone

2 years

My first note on the draw moudle in Blender. Hope it helps for newbies like me.😀

Tweet media one

0

3

21

@jwtstone

jwtstone

11 months

A little progress on optimizing contour curves from shitty surface

1

3

21

@jwtstone

jwtstone

1 year

@nice_byte Not really. There are fairly well-written codebases too. Ngnix, Blender and etc. The shittiness of game engine code is specific due to the current state of game dev and the industry.

1

0

17

@jwtstone

jwtstone

2 years

@rms80 Digital mesh processing is still a dark magic. You can find a thousand blogs on coding a tay tracer, but very few about mesh boolean or other mesh algorithms.

4

3

17

@jwtstone

jwtstone

10 months

It might look like nothing, but this is a GPU remesher.

0

1

14

@jwtstone

jwtstone

1 year

@LandSuzume Idk but this makes my day happier. Thanks for the art

0

0

0

@jwtstone

jwtstone

2 years

@h3r2tic It's like a giant bureaucratic system, you need to fill x1000 files to get approval to eat an egg

1

0

14

@jwtstone

jwtstone

4 months

I just want a 3D renderer that renders line art. It was a simple goal... Five years passed - it's still not accomplished, and I'm forced to learn academic gibbrish like "gradient diffusion" and "Eikonal equations on a Riemannian manifold"

0

1

14

@jwtstone

jwtstone

2 months

For now, the system supports per-object parameters; I'm also considering multiple sets of curves with different styles for each object, but I'm unsure if that's much needed.

2

0

12

@jwtstone

jwtstone

1 year

Somebody just asked me for the video GPU contour paper. Here is the video I made for EGSR 2022. In case anyone is interested🥴. GPU-Driven Real-Time Mesh Contour Vectorization via @YouTube

Tweet card media

GPU Driven Real Time Mesh Contour Vectorization

We represent a real-time method to generate vectorized 2D curves from 3D mesh contours. Which achieves comparable quality to offline CPU-based methods and up...

www.youtube.com

2

5

11

@jwtstone

jwtstone

1 year

It's crazy, but I'm linking 3D mesh edges into contour curves ON THE GPU. And this happens really fast since I ported most of my GPGPU shaders to Blender. Have to sleep now; the sun still rises tomorrow🥱

0

1

11

@jwtstone

jwtstone

1 year

@mrkkrj Realizing this book actually exixts is both funny and traumatizing to me.

1

0

11

@jwtstone

jwtstone

4 months

@EY0XIN It's in the plan to be included in future official Blender code.

3

0

11

@jwtstone

jwtstone

4 months

Explaination of my clip: This is a test for generating & tracking animated curves. Similar to hand crafted "Genga" like this

@mahkey0

Mahmoud

2 years

Thank you for watching today’s episode of Bocchi the Rock!!! Huge thanks to all the staff involved, huge love!!! 🎸💥🫶🏻 Today i made my Genga debut on BTR, I’m appreciated for the opportunity!! #ぼっち・ざ・ろっく

33

1K

6K

0

0

11

@jwtstone

jwtstone

17 days

Godot is going down... From what happened between Concord and BlackMythWukong. What they did was very unprofessional.

0

0

10

@jwtstone

jwtstone

1 year

@blue_nile_3d @panthavma It is still a prototype, WIP. Maybe next year, I'll consider that if everything goes well enough.

0

0

9

@jwtstone

jwtstone

11 months

Goo Engine and the Future of 3D Anime via @YouTube Ah, a new competitor to Malt; I'm curious how the Jniper engines will come out to be... @DillonGoo

Tweet card media

Goo Engine and the Future of 3D Anime

After a year since its release, Goo Engine has developed into a popular software for NPR animations and 3D anime. Dillon and his team will be showcasing the ...

www.youtube.com

1

3

8

@jwtstone

jwtstone

5 months

the 3d-to-2d curve resampler is working. I like this :)

Tweet media one

0

0

8

@jwtstone

jwtstone

1 month

@GlvGalv blame?

0

0

7

@jwtstone

jwtstone

2 months

fuck it; the curves are bound to flicker - unless I use some costly AI algorithm. I will quickly finish this contour project and publish a Blender patch. It has taken me too many years, and I have other things to do.

Tweet media one

2

0

7

@jwtstone

jwtstone

1 year

@AversionReality c++ and glsl. That's why it's so fast

0

1

7

@jwtstone

jwtstone

5 years

@SebDeguy @MKlekner @cgboost @Substance3D Believe it or not, as a graphics programmer, I started to study from Substance Designer rather than books, it helped me so much: I learned GPU programming from pixel processors, and procedural techniques from reading those complex graphs underneath those noise nodes...

1

0

6

@jwtstone

jwtstone

2 months

@sparkie237 Performance is not a problem, this thing runs realtime under millions of triangles

1

0

6

@jwtstone

jwtstone

4 years

@ucupumar I'm a simple man, I see nice waifu models, I'll buy it.

0

0

5

@jwtstone

jwtstone

6 months

After years of programming, when I saw everything working after a large refactor, I felt disturbed and started to panic like hell

1

0

5

@jwtstone

jwtstone

4 months

@lizaledwards I agree it is bad, but the technology won't just stop here. Instead of totally denying/rejecting AI, it might be better for artists to actively participate in its development and make AI controllable, beneficial, and safe for creators.

5

0

6

@jwtstone

jwtstone

4 months

Split curves at sharp corners are harder than one would expect. After this, I can even fit Bezier curves on the GPU, but that might be overkill. Skeletal strokes are all right, I guess. I'm tired of this.

Tweet media one

0

0

6

@jwtstone

jwtstone

4 years

@BettiniGabe @polycount This is called LUT. You can even bake large data sets into a batch of parameters, which has a fancy name called Neural Network

1

0

5

@jwtstone

jwtstone

2 months

I don't understand why western games were coming to this pathetic state. These woke people ruined Wolfenstein - one of my favorite game series. I'm glad that the JP game industry gives zero fuck about those crazy radical wokes, and now China is also catching up.

@Pirat_Nation

Pirat_Nation 🔴

2 months

"No diversity' yeah alright, i think we know why

Tweet media one

701

2K

42K

0

1

5

@jwtstone

jwtstone

4 months

@HimemiyaRie Hi Hime, is there a design sheet consisting of three-view drawings? I was planning to sculpt a 3D model for you, but I could not find any on the web.

1

0

4

@jwtstone

jwtstone

1 year

@_akhaliq To be honest the results don't look very natural though.

0

0

4

@jwtstone

jwtstone

1 year

The quality is better now with some hacks; I guess I don't even need to soft-rasterize the lines.

Tweet media one

1

1

4

@jwtstone

jwtstone

1 year

@ponymolly_ @reduzio @Razer4T7 It's called NPR(non-photorealistic rendering). It has the same complexity compared to its PBR counterparts. Not everything has to be "photorealistic." Have you ever seen Ghibli movies? In your theory, then it's absolutely cheap and not "fancy."

0

0

5

@jwtstone

jwtstone

3 months

I hate it when things barely work after I've put in moderate effort. It either means I'm going the wrong way and overcomplicating, or I just need to put some more effort into it.

1

0

5

@jwtstone

jwtstone

6 months

Recent AI-related graphics research is too far away from real applications. The only successful invention - DLSS came from Nvidia. Sometimes, I think the industry is leaving academia in the dust.

4

1

4

@jwtstone

jwtstone

1 year

Nice, the gfx API in Blender has more sanity than I'd have expected; things are going faster now :)

Tweet media one

1

0

4

@jwtstone

jwtstone

8 months

Still shitty; smoothing contour curves is really hard... But at least now I have a framework to manipulate the surface.

Tweet media one

1

0

4

@jwtstone

jwtstone

2 years

If the website above cannot be loaded, here is the direct link to the code: and the paper:

Tweet card media

GitHub - JiangWZW/Realtime-GPU-Contour-Curves-from-3D-Mesh: A real-time, GPU-driven method to...

A real-time, GPU-driven method to generate 2D curves from 3D mesh’s contour. - JiangWZW/Realtime-GPU-Contour-Curves-from-3D-Mesh

0

1

4

@jwtstone

jwtstone

3 months

hope some artist could enlighten me with some ideas...

3

0

4

@jwtstone

jwtstone

5 months

This has became a joke in China. We just cannot believe how inefficient it is.

@CaHSRA

CA High-Speed Rail 🚄💨

5 months

As we continue highlighting a structure a day for #InfrastructureMonth , check out the Adams Avenue Grade Separation, which was completed in December 2022! The 357-foot long structure, built by @DFJV_CP23 , takes traffic over the existing railroad and future HSR lines. #BuildHSR

Tweet media one

Tweet media two

Tweet media three

Tweet media four

45

10

345

0

0

3

@jwtstone

jwtstone

1 year

The hybrid soft & hardware contour rasterizer is near perfection now; it's even better than my old soft rasterizer... I have even a better solution to try out, but I guess this is good enough to vectorize stroke curves from.

Tweet media one

0

0

4

@jwtstone

jwtstone

6 months

Unity is very likely to be doomed, according to his profile. They just never learn...

@80Level

80 LEVEL

6 months

Mattew Bromberg, former EA and Zynga Executive, has been appointed as @unity 's new CEO. Details: #Unity @gameindustry

Tweet media one

57

31

141

1

1

4

@jwtstone

jwtstone

3 months

The UI of Zbrush is so bizarre; it's even worse than the trash pile down from my apartment.

0

0

4

@jwtstone

jwtstone

22 days

Today, my colleague notified me of a CEDEC talk that dissects my work; I think the representation is even better than mine at EGSR...

@SiliconStudioJP

シリコンスタジオ

@SiliconStudioJP

2 months

＼CEDEC2024 発表資料を公開しました／ PowerPointおよびPDFのデータをダウンロードいただけます。次世代NPRの輪郭線表現に迫る！リアルタイムベクトルストローク生成手法 StrokeGen を徹底解剖 pptx（81.5MB）／ pdf（6.16MB） #cedec #cedec2024 #シリコンスタジオ

0

2

2

0

1

4

@jwtstone

jwtstone

7 months

I might overlooked my ability to program GPU. should always remind myself of its haunting nature.

0

0

3

@jwtstone

jwtstone

4 years

@keenanisalive @CSDatCMU Thank for sharing! I wonder if the first half of "Discrete Differential Geometry" could be realeased also... Prof. LiuLiGang in University of Science and Technology of China will also give a open-accessable DGP lecture in one or two months later, what a good time to learn!

1

0

3

@jwtstone

jwtstone

1 year

@ZaedDB This shows 3D curves on the mesh, with or without occluded parts. However, the actual curve shape is still not perfect even on a densely subdivided mesh. I'm planning to do GPU remeshing like the smooth contour paper you ported before.

1

0

3

@jwtstone

jwtstone

1 year

@shiorinovella @edodamedo I wonder if it is a good idea to train a vtuber chatbot by collecting question&reactions from all the superchat sessions.

0

0

3

@jwtstone

jwtstone

5 months

I've underestimated the difficulty of perfectly rendering 3D polylines into 2D strokes... LOD and foldings are non-trivial problems

1

0

3

@jwtstone

jwtstone

9 months

It's just a shitty mesh wrapped with hopeless textures. It is frustrating that thousands of graphics researches still cannot achieve any system that truly understands 3D topology or geometry. Remeshing is a good example of this.

0

0

3

@jwtstone

jwtstone

2 years

For god's sake, is there any proper tool for writing GLSL code? Resharper was way too good for supporting HLSL and I had enough with the crappy GLSL linting in all IDEs.

1

0

3

@jwtstone

jwtstone

1 year

@ZeozenB These are arc-len parameterized curves, so you can do any stylization if the parameterization is good (but it's not so good, for now).

0

0

3

@jwtstone

jwtstone

2 years

@dddjef It is possible, however I'm not sure if I had enough time to port my code to Blender, which I'm not very familiar with. Anyway, we have done detailed comparison to Freestyle and Line Art. For example, the performance comparison:

Tweet media one

1

0

3

@jwtstone

jwtstone

6 months

Pablo Dobarro has left Blender? I wonder who is maintaining the sculpt features now...

0

0

3

@jwtstone

jwtstone

4 years

Real-time Contour Parametrization, Fully implemented on GPU

Tweet media one

Tweet media two

0

0

3

@jwtstone

jwtstone

5 months

I really wished that people can be more honest, serious and practical about their projects. AI people rush so desparately to get investment/paper acceptance... Please have some class

@tejasdkulkarni

Tejas Kulkarni

@tejasdkulkarni

5 months

Text -> Image -> 3D -> AI-assisted UVs -> AI Retexturing. This is now live for all our paid users. I am incredibly excited about hybrid Artist + AI workflows.

8

1

32

0

0

3

@jwtstone

jwtstone

6 months

oh no, random flickers, here we go again

0

0

3

@jwtstone

jwtstone

8 months

Maybe good taste and patience are all one needs for art and research; with that, one could do it all alone until the output is to his/her content.

0

0

3

@jwtstone

jwtstone

2 years

Hope they could open the source code. But in my experience, Japanese ppl hardly share their technology for free.

@psoft_cg

PSOFT Visual

2 years

2023年4月18日に「Pencil+ 4 Line for Blender」をリリースし、あわせて「PSOFT Pencil+ 4 Render App」も発売します！ #psoft #pencil4 #3dcg #blender #b3d #npr

Tweet media one

4

235

469

0

0

2

@jwtstone

jwtstone

9 months

Progress peek: GPU Remesher + GPU Surface Analysis. It's reasonably close to my initial plan now...

Tweet media one

0

0

3

@jwtstone

jwtstone

21 days

Isn't that wonderful? Artists keep on shitting out giant shit-balls, and you, as the graphics programmer, have to clean up their ass; simply amazing :)

@BenSimsTech

Ben Sims

21 days

Debugging node based shaders is really such a great experience, I can totally understand why we want to just get rid of handwritten shaders entirely. I can totally tell what's going on here and which of the 200 nodes this corresponds to, since everything is so clear and readable

Tweet media one

14

24

323

0

0

3

@jwtstone

jwtstone

2 months

@toni_buenavida I'll open a discord when releasing the beta version :)

1

0

3

@jwtstone

jwtstone

1 year

An optimized version of my GPU list ranking algorithm, serializing 5 million nodes from linked lists into arrays. Takes about 40% less time compared to my old implementation (Wyllie's pointer jumping ) This algo. is essential for contour curve chaining, happy about the result!

Tweet media one

1

2

2

@jwtstone

jwtstone

5 years

@zeuxcg Nice technique, But how could this be useful? It involves a matrix multiplication anyway...

1

0

2

@jwtstone

jwtstone

9 months

@ChengduLittleA The comments are just some very naive thoughts, but artists, indeed, should have their credit.

0

0

2

@jwtstone

jwtstone

4 months

@tomix55100 Yes, it can be used to render contour, highlight outline or shadow outline.

1

0

2

@jwtstone

jwtstone

2 months

@Petcson I suggested several times but there were internal frictions inside Blender so I kinda lost my interests. The merge might happen in the future but for now I'll keep myself an individual developer.

0

0

2

@jwtstone

jwtstone

1 year

@megamarsun My personal opinion is both yes and no. Only if the developers respect art as creational craftsmanship, empower artists & let them feel safe and interested enough to join the process.

1

0

1

@jwtstone

jwtstone

7 months

Rushing for the upcoming GPU article, so stressed...

0

0

2

@jwtstone

jwtstone

4 months

@panthavma Siggraph? or other conferences? I'll keep an eye on it

1

0

1

@jwtstone

jwtstone

5 months

@rms80 The 3D AI hype is just nonsense. There hasn't been a proper neural rep for meshes yet.

0

0

1

@jwtstone

jwtstone

4 years

@navigavi Nice lineart, but the best is the storytelling

0

0

2

@jwtstone

jwtstone

2 months

@UnrealEngine Typical Unreal documentation for their code: "function DoThis: This fuction does this." and for Unreal there is nothing like a thread from Unity forum where you could just learn everything about the function.

1

0

2

@jwtstone

jwtstone

1 year

Line visibility is notoriously hard. Broken lines, shitty aliasing everywhere with hardware raster. Guess I still have to go soft raster. Like I did years ago in Unity. But this is gonna be harder to do in Blender... Parallel allocation was such a pain, even within Unity.

Tweet media one

Tweet media two

1

1

2

@jwtstone

jwtstone

1 year

Some random thoughts about the temporal coherence for animated line drawings: This is not only a problem for contour rendering algorithms but also a problem for human artists - especially when the curves get stylized.

1

1

1

@jwtstone

jwtstone

2 years

@Atrix256 Not worth it for rendering, specially if you want try it for TAA-ish temporal filtering. It only useful for control engineering, for example, robotics. Otherwise it's better to consider neural filters

0

0

0

@jwtstone

jwtstone

4 years

@decltype_sammy It's typically called, Jonathan Blow

0

0

2

@jwtstone

jwtstone

3 years

@ak92501 "without NN" 😂

1

0

2

@jwtstone

jwtstone

4 years

@FreyaHolmer URP source code is just a hell of trash code, horribly designed api with awkward legay shit code, It makes me want to vomit every time when I read through URP source code.

0

0

2

@jwtstone

jwtstone

5 months

@BrunoLevy01 Great work! only wish I could gain such an expertise on polygonal mesh processing :)

0

0

1

@jwtstone

jwtstone

7 months

@RanarifSC I hope the storyline won't be as abstract as Hylics... Hylics had good music and art, but its abstract storyline made it hard to get a wider audience.

2

0

2

@jwtstone

jwtstone

2 months

@shuncao001 @BrianKaris @mirror2mask @siggraph I admire your efforts and rich experience in optimizing mobile GPU performance. But this credit is far from enough if your work is heavily inspired by or based on Nanite—people will mistake it for a totally new technique.

1

0

2

@jwtstone

jwtstone

6 months

@happy_paintings @lukesherbo Agreed, good work starts from classy tastes

1

0

2

@jwtstone

jwtstone

4 years

@bgolus Actually there are only 2 kinds of lines. 1. lines that varies in run-time, a.k.a "Contour" 2. lines that can be drawn off-line, like freestyle lines in Blender.

1

0

2

@jwtstone

jwtstone

1 year

@Atrix256 Take a look at the presentation of GuiltyGears and GenshinProject at GDC. I think that's basically all ypu need to know for practical uses. If you could understand Japanese checkout their CGWorld magazines.

0

0

1

@jwtstone

jwtstone

3 months

@pragma37 However, it is empirical to have tapered lines from occlusion/cusp points. It is often used in art and very effective...

Tweet media one

0

0

2

@jwtstone

jwtstone

11 months

Getting the old sad & hopeless feelings when doing GPU-based numerical/topology optimizations: you don't know why it does/doesn't work, and you don't even know how to test/verify your ideas... It's just a constant struggle

0

0

2

@jwtstone

jwtstone

9 months

I'm slowly sliding into a GPU mesh processing library just to generate some pretty curves. Is this too much...

1

0

2

@jwtstone

jwtstone

11 months

Toby makes such good games that I'm starting to question what I'm doing in my career now... ... We don't even need that many fancy techniques to make good games.

0

0

2

@jwtstone

jwtstone

10 months

@BrunoLevy01 I believe that it was accelerated by GPU, but it also has some workload on the CPU side. But I cannot judge anything about it since robust triangulation is already hard enough, not to mention parallelizing it.

1

0

1

@jwtstone

jwtstone

1 year

I think there should be some comparison to my work. I've read both papers. I am not convinced they could be practical. Only applies for subdiv surfaces and occluding contours. The uv-mapped algo. seems to overly smooth the mesh to make the curves right.

@AaronHertzmann

Aaron Hertzmann

@AaronHertzmann

1 year

This year at @siggraph , we present two papers that, I believe, represent breakthroughs on the problem of computing occluding contours of smooth surfaces. They are foundational to non-photorealistic rendering, but bafflingly-hard to get right. 1/

4

39

163

0

0

2

@jwtstone

jwtstone

12 days

I remember watching a clip of him soloing at the Crossroads Fest. Also gave zero fuck, wears like a high school geography teacher... The guitar playing was unbelievably good, though.

@Steven_Hyden

Steven Hyden

12 days

This has to be the most "I don't give a shit" album cover I've seen maybe ever.

Tweet media one

172

233

6K

0

0

2