AI generation of 3D models

Started by angros47, October 11, 2024, 22:52:08

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angros47

Nowadays there are several web sites that allow to create a picture from a text description, using AI. Even Bing offers that service.

A similar concept is also possible for 3d meshes:

https://www.meshy.ai/

RemiD

#1
interesting...

(see attached screenshot)

but not sure if such 3d models are usable for video games.
the mesh structure must be made in a specific way around joints, and the mesh must have preferably 1 surface (or a few surfaces) and not many verticles / triangles.

and then there is the intellectual property / copyright issue.

notice how i have selected a 'low poly' generation, and the generated model has 23718vertices and 41680triangles.

i don't call this 'low polys'.  ::)

RemiD

#2
compare this to my 'low polys' model :

(see attached screenshot)

156vertices, 280triangles

i only have to improve the texture, and it can look very similar. (a normal map would also improve the appearance with small reliefs without increasing the number of vertices / triangles)

MrmediamanX

Yep, it would seem that meshy tends to export out models with an excessive amount of poly's.
I made an old low poly pumpkin model from decades ago when my laptop was a piece-a-crap, most of the detail comes from the texturing.

It's a thing that doe's when it don't..

Baggey

Can i adapt this to wonder woman? :-[
Running a PC that just Aint fast enough!? i7 4Ghz Quad core 32GB ram  2x1TB SSD and NVIDIA Quadro K1200 on Acer 24" . DID Technology stop! Or have we been assimulated!

Windows10, Parrot OS, Raspberry Pi Black Edition! , ZX Spectrum 48k, C64, Enterprise 128K, The SID chip. Im Misunderstood!

MrmediamanX

Quote from: Baggey on November 03, 2024, 13:37:42Can i adapt this to wonder woman? :-[
Yep  8) 


Just joshing ya  :D
It's a thing that doe's when it don't..

Baggey

What are yu using to do this?
Running a PC that just Aint fast enough!? i7 4Ghz Quad core 32GB ram  2x1TB SSD and NVIDIA Quadro K1200 on Acer 24" . DID Technology stop! Or have we been assimulated!

Windows10, Parrot OS, Raspberry Pi Black Edition! , ZX Spectrum 48k, C64, Enterprise 128K, The SID chip. Im Misunderstood!

RemiD

personaly i use 'fragmotion' to create 3d models ( modeling, uvmapping, 3dpainting, rigging (adding joints / bones), skinning (setting the influences of some joints over some vertices ), animating ( with several poses per animation )

and i use 'photofiltre' to draw / edit images and textures.

RemiD

QuoteI made an old low poly pumpkin model from decades ago when my laptop was a piece-a-crap, most of the detail comes from the texturing.
this is 'low polys', indeed !
you could have added a little more details on the texture (larger width,height for the texture, smaller texel size), however

MrmediamanX

Quote from: Baggey on November 03, 2024, 15:50:40What are yu using to do this?

Fragmotion and milkshape3d.

Quote
Quote from: RemiD on November 03, 2024, 17:55:46
QuoteI made an old low poly pumpkin model from decades ago when my laptop was a piece-a-crap, most of the detail comes from the texturing.
this is 'low polys', indeed !
you could have added a little more details on the texture (larger width,height for the texture, smaller texel size), however
To true, the texture size is 32x32 though I tend to use no texture filtering or a velvet shader with post effects to clean things up a little.
I may have bookmark an AI photo/image enhancer/upscaling site for later use.
It's a thing that doe's when it don't..

RemiD

#10
here are some others screenshots to see how (not) 'low polys' is the mesh generated by 'meshy.ai'...

and the UVmap is really messy...

but it looks nice, it is not so easy to create nice texture with baked lighting shading effects.

MrmediamanX

#11
Yikes, the topology is all over the place. I think Meshy can export as quads as well which may tidy things up.
But it may be easier to just use either sketchfab:  Popular 3D models - Sketchfab or CGtrader:  Free 3D Models | CGTrader
if modeling is a no go. I just managed to mess around with a freebee pumpkin jack o lantern model from sketchfab, turned out ok.

It's a thing that doe's when it don't..

RemiD

this one is more 'low polys' indeed. :)

i will take a look at these websites, thanks

there is also 'tubosquid' for others 3d models to get some inspiration.

however i am going to create the 3d models and uvmaps and textures myself, for now.

and maybe hire a specialized artist to improve the look, in the future... if i manage to finish a game which is good enough.

Derron

Let the AI do the "model design" (so the "shape/volume") and then run it through some remesher for good low poly quad structure (quad remesher etc).

You can also project the UV textures on the new quad-mesh and the UVs might look better then.

Automate the above ... and voila, job done.


PS: same should be doable with mixamo or how the tools of today are named - talking about these websites where you drop your model and it automatically rigs it for you. Then download the rigged model.


bye
Ron

RemiD

Quoteand then run it through some remesher for good low poly quad structure (quad remesher etc).
the UVmap is so messy that automatic tris reduction does not work well (tested with Fragmotion)

maybe it work better with others softwares i don't know...

in the end, i don't think this takes less time to use AI to generate a mesh and uvmap and texture and then have to reduce the details and to 'clean' it.
rather than making the mesh and uvmap and texture manually but precisely what i need.

let's see how this evolves...