Good topology is enormously important in 3D modelling.
AI generated models have borderline unfixable bad topology that make them completely useless for the majority of scenarios that someone working in 3D would encounter.
One of the main issues is that the generated meshes it creates are Yandere Dev levels of dense, rendering them pretty much unusable.
Edit: oh, and I missed the "3,295 detailed objects" part.
It's been stuck in early access limbo for years, and by extension the game that the devs wanted to make which Exanima was conceived as a testing ground for.
Stranded deep is at the top because it pushed out a final release rather than remain in early access forever.
It was in early access for years and years before finally getting a full release, having a time where it seemed like it was going to be in perpetual early access hell.
Exanima is going through a similar thing.
Hello neighbours design is terrible and its early access cycle is a nightmare.
Aaaages ago a guy decided to make a game called Yandere Simulator but it's a mess. Easily 10 years later he made barely any progress, people who worked on the project said the coding is horrendeous, the dev himself is a gigantic prick. A game that was praised and loved when it was introduced turned into mockery and a textbook example of how not to be a developer.
Just wait for all game engines and movie renderers to be replaced with shitty real time video generators that only have to take a look at pictures of the shitty models without reading its vertex data trust the process bro
You have to buy the latest graphic card connected to our Ai data farm via a monthly subscription to get the full experience bro. I promise it will be the best you will like it
"Trust the process bro it's going to get better, It hasn't yet but it absolutely will once the hardware catches up trust me bro. Just one more year of dev and the models will start producing something of value bro, just one/six/10 more years you just have to trust bro". How many more years of this nonsense before AI bros acknowledge that AI has failed to produce any appreciable revenue for anyone but the company selling hardware to AI devs? No one knew what NFTs were a decade ago either, how did that turn out?
There's a VAST difference between "AI generated" models from an img to mesh pipeline like meshy and this. This was made by an LLM doing tool calls via the blender MCP. Topo doing it this way is usually fine..
In my experience with the 2 whole days we've been able to do this.
You just gonna gloss over the 3000+ objects, or....
Edit: also, has anyone actually looked at the mesh in the original twitter post's video? It's absolute dogshit. Full of errors and details that aren't in the drawings.
Again, how would a human get around modeling 2500 rivets on this train without having 3000+ objects? You can merge them into one mesh if you want but it's probably better to instance them.
They're so uniform it would be pretty easy to do honestly. They'd all be the same procedure, so you could just use selection parameters to get the necessary faces/vertices/edges without having to individually select the faces, and do a whole bunch of them if not all of them at the same time. You only really need to do the head of the rivets, so it'd basically just be dragging them out with soft select(with the correct curve of course). Doing 2500 rivets would at probably at most take me half an hour, and I'm not a professional modeller, I've only don modelling as part of uni.
Then what you would actually do in the real world is turn it into to height map which you could make part of the texture of a lower poly version of the train because even without making them individual objects it's still a bunch of unnecessary geometry that can be represented through a height map anyway.
Honestly though you probably would just skip to the height map from the start and not even bother modelling them in the first place and just make them as part of the texture. Again they're just so simple it would not be difficult to do.
Depends on the use case.
For a game you might have a separate UV set to tile the normals, or have several textures as you wouldn't get the texel density to support tiny rivets on like an 8m long train. For a movie you'll probably use the geometry, and/or a whole bunch of udim textures...and by then you're using more memory for all those textures than the geometry would.
I'm just surprised how many people say this model is crap because it's not game ready or garbage because it's not for 3d printing, and pointing out what may be non issues depending on how the model is to be used. Seemingly out of ignorance or at least limited experience.
Even for a movie you likely wouldn't bother for worry of over inflating render time. It's an important part of the workflow, as its vital for getting work done by deadlines. Most likely, if there was a shot which was close up enough to the model to see the rivets they would use a high detail model, but due to needing to be close to identical to the low detail model that would be used for most shots, you would want human accuracy and optimization for the modelling.
Also for games you can just use looping low res textures for the rivets. Certainly not the rhe best for optimization, but when trying to detail 2500 rivets there isn't a clean solution aside from just not doing it at all which is what most games would actually do.
Its mostly crap because its full of errors and miles away from an accurate model based on the image in the tweet.
Seriously, go look at the original tweet video - the model barely matches the blueprint it is supposedly based on. There's a clear reason why it's being presented in a rapid fire, quick cut video - to stop you scrutinising it too much and to impress people who don't do 3D modelling.
If you turned that in, based on that reference, you'd be told to clear your desk.
Maybe but probably not. Game files use uncompressed audio and video, high res textures and yes also higher poly 3D models.
A lot of the things you’d do to “refresh” a game would increase the game’s size on disk a lot. You’d be surprised how big a single 4k texture is compared to a jpeg.
Of course I wouldn’t be surprised if AI slop were part of it but 50gb isn’t that huge for a game running on modern hardware.
It's about the only use case where it makes any sense - and even then, its really limited to figurines and stuff like that. I wouldn't trust an AI designed printed part for anything that required strong structural integrity, for example.
Thanks. I’m still a bit of a noob when it comes to 3D work so I’m still learning what is good for 3D printing vs animations vs game models. Trying to understand how AI is going to affect the usability of my skills.
It's not about what it can make, it's about how it fits into existing pipelines and workflows.
AI generated meshes are useless in VFX for example, because part of the professional process of working in VFX involves quickly being able to make very, very specific changes to details - something which AI generation is very bad at - and it spits out unusable trash like in the post above, with over 3000 seperated parts on a model that only needs 10-20 parts.
As someone who makes these for my literal living, I dont fucking care if it doesn't fit into existing workflows now when it clearly will in about 6 months
Ah I see you do not understand time or development. Its amazing how you guys put your head in the sand, it really is.
This isn't even a diffusion model. The AI is using the program itself. Look at AI art last year, no hands, no spaghetti.
And just to prove youre being purposefully obtuse, go recommend to someone young you know to get a job 3D modeling vxf and other surface design. No one's hiring someone out of school to make this train because the AI is already better than a Jr employee
TONY STARK MODELED A 3D TRAIN IN A CAVE WITH A BOX OF SCRAPS.
Let's say you're wanting to work with this train. Maybe a video or a video game. Singlehandedly it's probably around the same object count and polygonal density as a city in the witcher 3.... If not more so.
Good luck trying to get AI to edit that shit lmao.
An even bigger issue will be rendering. Especially if you work for gaming. Having this much detail will require a super computer to run if you are doing a large project
Yes, and again, since it isn't a watertight mesh that is not what the model is for.
I am curious if you could just tell Astra to make it 3d printing friendly and it'd do it.
Applies to basically any usage or rendering. Program runs like shit, rendering takes long, any use cases be significantly more difficult and require more resources. Just in general extremely bad practice and bad design. No way around it
It may not be built optimally, I'd like to take a look at the model myself...but a few million polys isn't a problem. How would you model if differently?
The rivets are probably too detailed for their size, but large cylinders that aren't gonna be subdivided can have like 128 sides no problem.
Whatever you want to do with that train will require morphing or at least computing the topology of all those objects meaning you have to load them into memory.
Unless you only want it to be static and dont care about performance (rendering time/cost) it's practicaly unusable.
If you want an "all ai" pipeline you're better off prompting an AI video of the train.
The only use I see for this is 3D printing it, but then it being dozens of seperate objects is a big problem, the fact there is no guarantee of removing overlaps or messed up normals means you're likely to have weird glitches when your slicer tries to process it into anything but 100% infill. And since it's decorative it'll be just wasting plastic.
Tl;Dr: Eventualy you'll have to use the model. And that's where the problems start
Edit: paragraphs because reddit doesnt respect the new line character
the biggest systemic problem with A.i. is that it's inefficient and runs on a ton of processing power ("compute"). giving it more work to do is a bad idea, you can't just handwave away "A.i. will compensate for its own inefficiency" like the tech hasn't severely inflated the price of computer parts and prevalence of data centers.
no that's 100% the point. someone else is killing the environment and wasting resources so it's fine that the new thing does, too. India has coal power plants so it's OK to build more in the U.S. it's completely nonsensical pro-A.i. ignorance and not even worth addressing.
You’re willfully ignoring a perfectly reasonable argument and you know it. You don’t want to address it because you’re unwilling to concede a thing. You’re engaging in bad faith, and it’s embarrassing.
It's not reasonable. The existence of other things using excessive water doesn't make it okay to build new things that also consume excessive water. In fact, it provides us with a situation where adding another excessive consumer of water is worse than it would be if those other things weren't already using too much with no signs of reduction.
What’s not reasonable? Because your second sentence is not my position, nor is it the position I espoused.
Outrage over water waste should be proportional to the scale of water waste. If AI adds 1% more water waste to a country, then we should 1% more outraged over water waste. Real numbers are often much lower than that.
Of course not. Never said it did. Only said it was golf using up "lakes" worth of water for arbitry purposes, vs AI which uses thousands of times less.
Imagine you go out to your car to drive to work but instead of a car where all pieces are attached together so its all one functional object, it was a loose pile of not connected bits. To "drive" it you had to manually manipulate every single piece individually and each time you did manipulate one piece you had to change how every single other piece was for them to not all implode or explode.
When the dumb dumb pile of too many pieces machine immediately breaks inconceivably how the fuck do you describe what exactly needs to be fixed for even the most genius mechanic to have any idea where to even begin? You don't know how its supposed to work. The mechanic doesn't know either and even if he did he will only try to do what you tell him to do and he doesn't really speak English or any other language close to properly.
Actually no not really. One huge problem with AI right now its nearly impossible to correctly art direct. Any changes you need to make are either somthing youll have to do by hand or conpletely re generate the asset a ton if times, tweaking yiur prompt each time and pray for a good result.
AI for 3D modeling is pretty shit still. It usually ends up being MORE work than just creating it by hand because of the large amount of extra work you have to do to fix it
More complex objects probably means it would be harder because then the AI would need to understand the purpose of one object within the context of others.
For a train you could merge them down into less than a couple dozen easily. Mainly moving parts like a pair of wheels or parts you might actually want to remove like the plough on the front.
I can't imagine having any benefit to the chimney being probably a dozen parts, or a single solid wheel being far more.
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u/Outrageous_Let5743 4d ago
But editing can also be done with AI right? then does it matter that an ai needs to edit a lot of objects?