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Blender's UI and Runtime: Much Faster Than GPUI

282 points ppmpreetham 4 hours ago 121 comments

scotty79 3 hours ago | parent

That sounds like an amazing idea. I've been using a lot of Rust+GPUI and sometimes behaviors that I'm expecting to be there just aren't.

Swapping it for UI that's as battle tested as Blender might improve things.

_odi_ 3 hours ago | parent

Super curious about the limitations you see in GPUI! I built a custom rust UI framework for the software i am developing but i always kept an eye on GPUI, what is limiting about it in your opinion?

zigzag312 30 minutes ago | parent

I'm curious about the limitations too.

GPUI and Makepad are the two Rust UI frameworks that seem the most interesting for what I'm looking for in a UI framework (hybrid immediate/retained mode, self-drawn widgets, open source).

chiroyce 3 hours ago | parent

always liked blenders design language, looks cool!

cultofmetatron 3 hours ago | parent

Ive been thinking this would be amazing to do for ages. happy someone finally did it. its the perfect system for interfaces where speed matters. hope to see more 3d modellers, video editors, daws and simulation systems built on this.

felixthehat 3 hours ago | parent

It would be such a boon if GIMP and Inkscape could adopt blender's fantastic GUI

kleiba2 3 hours ago | parent

De gustibus et coloribus non est disputandum.

darreninthenet 3 hours ago | parent

vel adrogantia

kangalioo 3 hours ago | parent

This feels like those AI models suddenly switching to Chinese mid-conversation

vintermann 3 hours ago | parent

Gustus est sicut nates - divisus est.

jansan 2 hours ago | parent

cum emptore

amonith 1 hour ago | parent

lorem ipsum

Cthulhu_ 1 hour ago | parent

expecto patronum

p-e-w 3 hours ago | parent

Inkscape’s UI is much, much better than Blender’s, IMO.

grufkork 2 hours ago | parent

Inkscape is actually one of the few FOSS apps that is actually pretty intuitive to use. In fact, way back when I first started using vector design tools, I found it more intuitive/had better feedback than Illustrator (same thing can't be said about GIMP vs Photoshop). Inkscape really is great, but I have one huge gripe: I'm sure there's a system to it, but the file export name never stays what I want it to be...

luckydata 2 hours ago | parent

Weird, I find it to be an unscrutable turd

Shorel 1 hour ago | parent

With a much simpler set of tasks to accomplish.

omnimus 6 minutes ago | parent

People are confusing UX with UI. Inkscape UX might be better for many people but it would be hard to argue that Inkscape UI is better - it got better recently but it's still far from blender polish.

4k93n2 2 hours ago | parent

and then rename it blimp

archerx 2 hours ago | parent

Fantastic is the last word I would use the describe blenders UI/UX.

felixthehat 2 hours ago | parent

A side by side screenshot of inkscape/gimp/blender for those who don't have them installed

https://cleanshot.com/share/WW9yFdMy

AlienRobot 1 hour ago | parent

One of the biggest problems with GIMP and Inkscape is how GTK renders numeric inputs. Look at the size of those +/- icons on the toolbar. For drawing software with lots of numeric inputs, that means an insane waste of space. Proprietary software like DaVinci and even Photopea have much smaller inputs, allowing them to create far more complex GUIs and featuring without cluttering the window.

anon-3988 2 hours ago | parent

I just want to be able to crop and draw on top of images. Like old Paint. That is literally all I want to ever do with images. What should I use in Linux for this purpose

phillc73 2 hours ago | parent

GIMP of course.

adhamsalama 1 hour ago | parent

KPaint

amlib 1 hour ago | parent

Use KolourPaint, it's a windows 9x/XP paintbrush clone with only a few improvements tacked on.

TonyStr 1 hour ago | parent

Photocraft has been working alright for me. I really struggled to learn GIMP, and I haven't found any easy lightweight image editing tool that replaces Paint.NET for me before trying Photocraft. It's still a little confusing since I'm not used to photoshop-like bindings and layout, but it hasn't been too hard to adjust. (I also only ever use it for small simple edits, drawing, cropping, color gradients, background removal, etc.)

Imustaskforhelp 1 hour ago | parent

There is paint.rs[0] as well which is intended to be paint.net open source alternative which works on Linux.

I’d be interested to know what you think about it

[0]: https://github.com/daijro/paint.rs

lozf 1 hour ago | parent

Perhaps Gradia [0], Pinta [1], or Krita [2].

[0]: https://gradia.alexandervanhee.be/ [1]: https://www.pinta-project.com/ [2]: https://krita.org/en/

wavewrangler 1 hour ago | parent

I easily modified pinta to do exactly this. You mean overlay, right? It can overlay, draw, manipulate, and I added a better file navigator so I can see which imagery I want to overlay to begin with. My use case was scientific in nature. What is yours, if you don’t mind my asking?

bondarchuk 13 minutes ago | parent

IrfanView in Wine, f12 opens a really old-school paint toolbox.

graynk 11 minutes ago | parent

https://photoflare.io/ is the one I've found to be most usable. Pinta is just unpleasant to use at high resolutions and it's buggy.

dev0p 3 hours ago | parent

I love the general idea behind Blender's UI.

And I do appreciate the effort that goes into it, especially in the latest versions as it got much better,

But I really really really REALLY don't want that UI in anything else other than Blender.

Please don't.

OtherShrezzing 3 hours ago | parent

If you're working on a small game project without an existing framework/platform, you usually build a really bargain-basement game editor alongside it. That editor takes a long time, and it's often spent in arranging UI stuff.

If you're already using Blender to make assets, there's some benefit to stuffing Blender's UI into your game editor too.

archerx 2 hours ago | parent

After trying blender for about 20 years I still find the UI/UX awful. I think a lot of the new blender generation has baby duck syndrome.

cl3misch 2 hours ago | parent

First time I hear "baby duck syndrome".

> Baby duck syndrome is a cognitive bias where people automatically prefer the first system, interface, or product they learn to use, judging all later versions or alternatives by how well they match that initial experience.

That's actually extremely common in scientific (GUI) software. And in any professional setting I guess.

fc417fc802 2 hours ago | parent

> That's actually extremely common in scientific (GUI) software. And in any professional setting I guess.

I don't think that qualifies. There's an important distinction to be made between an aesthetic preference versus a professional not appreciating a tool being mucked with. Anything that interferes with my workflow without immediately providing substantial benefit is something that's actively harmful. In fact even if it does hypothetically provide huge benefits I still might not want to deal with it right this second.

mejutoco 1 hour ago | parent

Blender had a very different ui before and a big redesign, so most people have different opinions between the old and the new design. It sounds like you find all of them awful. I find that surprising and wonder what 3d program you find have good ui.

archerx 54 minutes ago | parent

I have used every version of blender and it has always felt harder than it should.

I have used 3Ds max, maya, lightwave, cinema4D, milkshape, wings, Houdini, unreal engine 1 - 5, Hammer, Threejs editor and probably more. The Blender UI is worse than all of the above.

bacheaul 32 minutes ago | parent

The question was which one do you think has a good UI... I'd be keen to know your opinion on this as well, what you think the current high water mark is in 3D design software UI is, or do you think they all suck, but Blender just sucks the most?

sehugg 1 hour ago | parent

Apparently there is a crowd still using 2.79b, the last version with the old UI (current LTS is 5.2)

My baby duck fingers could probably pick up LightWave 3D again in an hour or two. I could never gel with Blender.

SkiFire13 1 hour ago | parent

In that case it would be competing with imgui, egui and similar libraries, but the submission is comparing it to GPUI.

PalmPilotProMax 3 hours ago | parent

Imagine this spinning off and becoming this generation's GTK.

mkl 2 hours ago | parent

Not going to happen, as it's GPL.

zerr 1 hour ago | parent

Akin to Java in Oracle vs Google case, keeping the API but LLM-ing the implementation can be considered as fair use.

lentil_soup 3 hours ago | parent

Why not? For similar applications it would be really beneficial to not have to reimplement all the little UI interactions they've polished over the years

luckydata 2 hours ago | parent

Polished is not the word I reach for when I think of Blender's UI

20k 2 hours ago | parent

This is just repeating a common meme. Blender's UI layout and organisation is fine, but this is a UI library. There's nothing wrong with blender's UI technically, in fact its pretty decent overall

fc417fc802 2 hours ago | parent

> Blender's UI layout and organisation is fine

I absolutely detest it (TBF I haven't used it for the past ~2 years) but I also recognize that it's an incredibly difficult problem space that lacks an obviously good solution, the tool itself is inherently and irreducibly complex, it's a free project with extremely limited resources, it's been consistently improving over time, etc, etc.

DrewADesign 58 minutes ago | parent

Everybody hates all serious 3d application interfaces… they’re just complicated. I’m professionally competent in Houdini, Maya, Max, Blender, Zbrush, Marvelous Designer, the UE editor… they all suck in various ways but it’s all a giant set of trade-offs and priorities. Beyond that, lots of these programs have lineages that go back decades longer than almost any modern dev environment and being so complex, UI changes can be quite disruptive. Kind of like why so many *nix cli tools are the same as they were decades ago. A lot of (no, not all) developers think they have the most complex tooling in the computer world — they definitely don’t.

coldtea 39 minutes ago | parent

There's a lot of thought in Blender's UI, and a lot of improvements over the years.

Fundamentally all 3d modelers have inherent degree of complexity. The ones that give a "simple" facade with fewer options make other things harder or having to look into obscure places.

All of that are beside the point however: people will use this as a GUI library, not as a Blender's UX design.

omnimus 11 minutes ago | parent

Can you give examples of what are polished UIs in your opinion?

amelius 3 hours ago | parent

How about a simpler UI consisting of just a text input field for AI.

jon-wood 3 hours ago | parent

Despite rumours to the contrary not everything is best interacted with via an LLM. If you want to go to that degree then have at it, all you need is an old school TTY on a serial cable, but the rest of us quite like having UIs designed to fulfil a purpose rather than a soup of Claudeish prose describing a progress bar.

atoav 2 hours ago | parent

"Oh you talk about different paint brushes and pigments? How about just hiring a painter?"

Yeah you can do that. If you have low standards and don't need control of the details.

coldtea 38 minutes ago | parent

Yeah, nothing like e.g. watching a video or drawing something and changing settings by asking AI.

atoav 2 hours ago | parent

No? I think there would easily be other use cases where Blenders UI would be very suitable, e.g. Audio software.

It is not a UI paradigm that you would use for just anything, but for certain poweruser software it is one of the best paradigms I have seen, especially since they managed to get rid of 90% of the rough corners in the past decade of development.

rramon 1 hour ago | parent

Egui also has terrible defaults: https://github.com/emilk/egui

But a good design system does the trick. Artcraft apps use this library and their Adobe clones come very close to the original apps.

wavewrangler 1 hour ago | parent

Yeah but, this can’t possibly be any worse than tkinter.

Q: “Whats wrong with tkinter?!?!”

A: It sucks, that’s what!

coldtea 42 minutes ago | parent

Typical HN top comment negativity :)

That UI is fine to be on many more places than Blender, given that many libraries people use are way worse. Imgui for one example.

IshKebab 3 hours ago | parent

Definitely a worthy goal but they've gone down a super weird route by providing clones of other GUI toolkit APIs on top of this. Your target audience is people that are ok with vibe coding. They don't care about switching to a proper Blender-style API.

Just because you can...

MomsAVoxell 3 hours ago | parent

More like a “why not both” situation, imho. I have apps I could port to use this immediately.

andsoitis 3 hours ago | parent

Use the native widget toolkit if the platform you target; your users will love you more.

swiftcoder 3 hours ago | parent

Most native widget toolkits don't actually support rendering into 3d canvasses very well, nor very compact UI layouts. I generally prefer native widgets, but for a dense prosumer application, they aren't always the correct choice (and you'll see even Apple stray from their native UI widgets for, say, Logic Pro)

pjmlp 2 hours ago | parent

They actually do, just not on GNU/Linux, **BSD worlds.

scns 1 hour ago | parent

Apple bought Logic.

swiftcoder 1 hour ago | parent

> Apple bought Logic.

A quarter-century ago, yes. If they haven't migrated to native widgets in 25 years, that might be an indicator of something

p-e-w 3 hours ago | parent

I target all platforms, and so does most other desktop software today.

bvrmn 2 hours ago | parent

Ok for linux it's GTK and Qt. What's native for windows in 2026? It's a complete joke of system UI.

chem83 1 hour ago | parent

In 2026 it’s WinUI. Microsoft has been clearer about it: https://learn.microsoft.com/en-us/windows/apps/winui/winui3

But the premise is silly: if Linux has two native toolkits, how is this a sensible recommendation?? Hint: it isn’t, because GTK/Qt are not the native, but rather simply the most used.

Also, go to Mac, and SwiftUI still doesn’t support all that AppKit used to, leaving an incentive for developers to deviate from the platform’s recommendation.

And back to Windows, WinUI still doesn’t fully replace Win32 or Windows Forms, so same conclusion applies.

anonymous908213 2 hours ago | parent

I am pretty sure HN is an enclave of the only remaining people in the world who think this way. A sanctuary preserving the last specimens of an endangered species.

creata 15 minutes ago | parent

None of the apps on my computer have any sort of cohesion with each other. It might just be me but I think this idea is dead, on Windows and Linux at least.

antman 3 hours ago | parent

License of GPUI is Apache and BlenderUI is GPL, which is limiting for adoption.

chii 1 hour ago | parent

GPL is the best opensource license. But seeing this as a library, it might need to be LGPL rather than pure GPL (ala, you can use it as a library without "tainting" your source, but if you make modifications to the library, you must release it).

solyin 1 hour ago | parent

AGPL if you wanna be serious about it.

chii 1 hour ago | parent

May be, but AGPL is intended for server based apps, rather than local apps (which i presume this library is intended, but i suppose the javascript part can be considered to fall into the server category).

ppmpreetham 14 minutes ago | parent

Hello, creator here.

I don't think we can use LGPL since we were derived from Blender's Source code, which is GPL.

Groxx 3 hours ago | parent

>Who wrote it?

>The repository is built entirely using LLMs, with no human-written code. ...

artemonster 2 hours ago | parent

and thats fine. without LLMs no human would have invested so much required time and effort to do this! and now such awesome things are possible with a bit of tokens and a small prompt. overall a win

opem 50 minutes ago | parent

Until the project gets abondoned after a few days, perhaps months. :)

xiange 3 hours ago | parent

It looks good, but the GPL license restricts the use cases

buster 2 hours ago | parent

Well.. Old discussion but I actually think it's the better way (sorry. MIT, you are more free then anything). Either contribute back or stay away from open source work that others did for you.

thisismyanon2 2 hours ago | parent

Can you even copyright LLM output? Even the readme points out humans didn't make any of the code.

ZoomZoomZoom 1 hour ago | parent

In this case you just can't spin it any other way than it being a derivative work of Blender. And this is great.

exitb 2 hours ago | parent

I was just a kid in 2002, so couldn’t contribute, but I remember checking the MoneyMeter going up every day, so that the community could buy out Blender and make it free software. GPL does restrict it, but it’s also only the only reason Blender is not a long forgotten piece of software from the 90s.

kqp 1 hour ago | parent

Three things one must never ask: a woman her weight, a man his salary, and an HN commenter what “use case” the GPL ruined for them.

slopinthebag 34 minutes ago | parent

in what way?

p-e-w 3 hours ago | parent

I’ve thought many times “Man, those widgets look terrible!”

I’ve not once thought “Man, those widgets are slow!”

spoiler 2 hours ago | parent

I never found them terrible, but I guess I spent a long time staring at them so maybe I just got used to them.

Do Maya and others have better UIs? Honestly, I find them more repulsive than Blender's

keyle 2 hours ago | parent

It's obviously vibe coded, but it's quite well done by the look of the ideas and implementation.

Zecc 2 hours ago | parent

What makes you say that? It was the part that goes...

> The repository is built entirely using LLMs, with no human-written code. The drawing and interaction code is ported from Blender's sources, and the behavior is checked by tests: C, Python, Rust and JavaScript suites, the tkinter side-by-side programs and the GPU parity test.

...wasn't it?

gostsamo 2 hours ago | parent

not a single mention of a11y or accessibility, so please be careful before using it for general purpose applications.

ppmpreetham 12 minutes ago | parent

It'll be added soon!

spider-mario 5 minutes ago | parent

That was my first thought as well. It would have been reassuring to at least see it on the roadmap.

hn_submit 2 hours ago | parent

This is excellent. I thought about this years ago for an OpenGL based desktop UI. Apple's UI is using something similar I believe. And the Windows UI too is mostly rendered using Direct3D (which is comparable to OpenGL) since Vista.

I hope someone else uses this for a new Linux distro.

pjmlp 2 hours ago | parent

Well, given that so many folks always argue they are Linux distros even though it is an implementation detail for userspace APIs, ChromeOS, WebOS and Android.

petterroea 2 hours ago | parent

The readme suggests it's a port of the blender code, at least the renderer is claimed to be so:

> The drawing code is a C port of Blender's own widget code

How can we guarantee BUI is still performant?

bvrmn 2 hours ago | parent

I have a python "DSL" which allows to create a simple UI for synth parameters you also make in python. It uses Tk and looks like, mmm, Tk with all other Tk issues. Project was abandoned because of it. Looks like it's time to revive!

pythonRon 2 hours ago | parent

I gave it a quick try (Fedora 44/Python/pyenv) with some Tkinter code which is supposed to just work... It doesn't.

pythonRon 1 hour ago | parent

After further exploration, it does work, but not without fiddling around with the tkinter code that exists. Not bad results; better than the original Tkinter rendering, anyway, unless you like that retro look.

luckydata 2 hours ago | parent

This project would benefit from a longer Readme.

Washuu 2 hours ago | parent

I have been remaking a Blender style UI in Kotlin for my Umamo project because I love Blender's UI that much.

I think I will keep going with my own efforts, but this looks nice!

ppmpreetham 11 minutes ago | parent

Yess, never stop building!

We also have a kotlin binding support coming soon, btw!

phillc73 2 hours ago | parent

It'd be awesome if kitty[1] and calibre[2] adopted the Blender UI.

[1] https://github.com/kovidgoyal/kitty

[2] https://calibre-ebook.com/

lukechu10 1 hour ago | parent

Why should kitty use Blender UI? It's just a terminal emulator with no GUI elements and is already GPU accelerated.

eloto333 1 hour ago | parent

jasbr

eloto333 1 hour ago | parent

habs

eloto333 1 hour ago | parent

aibi

nicoburns 1 hour ago | parent

For anyone looking at Rust GUI: don't expect GPUI to be the fastest. From what I've heard, Iced, Slint, Dioxus Native, Freya, etc are all faster. Despite claims of being blazingly fast, GPUI isn't that optimized. Zed gets away with it because it's UI is simple.

bita_nidir 39 minutes ago | parent

Really? From what I've heard, Iced, Slint, Dioxus Native, Freya, etc are all slower.

hackyhacky 22 minutes ago | parent

If only there were some way to determine speed based on observable data. Oh well maybe some day.

Matumio 9 minutes ago | parent

If only the game I am surely going to develop some day would not waste 7% of the rendering budget on drawing the menu sliders! Must research all options now before I start. Must make an objective choice, so I need number that can be compared neutrally between frameworks. So, rendering performance it is.

shaky-carrousel 2 minutes ago | parent

This must be the lowest effort hacker news comment ever. And I've made some really low effort myself.

contingencies 1 hour ago | parent

OK who's gonna burn the tokens rewriting a whole Linux system with BUI? You know you want to...

ppmpreetham 13 minutes ago | parent

Lol, I'll showcase that project in the website if someone actually does that

parasti 53 minutes ago | parent

"Decoupled from project by external developer" generally means "with a very high chance of immediate bitrot".

creata 52 minutes ago | parent

If you're going to ask Claude to write a library with a web version, can you also ask Claude to write a web playground?

bita_nidir 42 minutes ago | parent

Nice! I've been waiting for someone to do this for a long time. Now I'll just need to wait a bit longer for someone to apply this to FreeCAD. Boy oh boy!

lukebitts 19 minutes ago | parent

That's really cool! I burned some tokens trying to develop something similar but gave up halfway. A lot of people criticize Blender's UI but as someone who has been using blender for more than a decade now I just find it so elegant. Just the customizability itself is something I miss on most 3D software, if not all of them. Being able to just split screens and change their functionality, paired with the tabs for different workflows, it is a really good solution for a very complex software. I'd like to see a game engine with this much UI freedom.

panzi 14 minutes ago | parent

Be aware of the license. You can only use it in GPLv3 programs.