The specs of computers we are working on are:
AMD Ryzen Threadripper PRO 5945WX 12-Cores 4.10 GHz
Nvidia A6000 RTX
512 gigs of RAM
We are working on very large scale models.
The projects in work that are getting stuck are anywhere between 6000 images to 35000-40000.
The models come to anywhere between 10 million polygons to 100 million polygons.
The Uv unwrap is somewhere between 10 textures to 20 textures at most.
It’s not consistent some projects with the same parameters finish the process without any issues,
and some get stuck at 71% specifically.
Dose anyone know what calculations happen on 71% specifically?
We have found that sometimes if you export the component and start the modeling proses for the top it dose complete the texturing proses, but again results vary and it’s not consistent.
We need help!
Thanks a lot.
Hello Daniel,
the number of polygons is quite small for such big amount of used images. Are you simplifying your models? If so, what is your process?
What unwrap settings are you using? And again, number of textures seems to be too low for such amount of the images.
I checked the texture process, and at about 70% step the texturing should be finished and after that the re-coloring should start. Can you check your texture settings and try to turn off the Recolor model after texturing option?
Also, maybe it is not necessary to use full scaled images in your case. Then you can try to check this tip: https://www.youtube.com/watch?v=5B6Vd5CWTtQ ?
Also, where are your images saved?
Hello Ondrej,
Yes the models are simplified, when the meshing process is done the models come to anywhere between 2.5B tris to 2B tris, after that we simplify them by half until we get to the desired amount of tris for our needs.
The Unwrap settings are mostly the same in all of the projects, the only thing we change is the maximal texture count and some times the unwrap method from geometric to mosaic .(I’ll add a screen shot of the basic unwarp settings we use)
I’ll try turning off the Recolor model after texturing option it is on by default.
For most of the process we put the downscale settings to 2, besides the alignment proses where we don’t downscale at all.
The images are saved locally on a 19TB ssd, so space is usually not a problem.
Dose Reality Capture have a problem with long file paths?(in windows file explorer)
Thank in advance.
Hello Daniel,
thank you for your information.
Can you try to use Fixed texel size style? Also, when you are using mosaicing method, this could take a long time for such models.
There could be some issues using too long file paths or file names.
Update,
Turning off the Recolor model after texturing worked!
The texture is a little lacking, but it could also be a problem with the texture count(relatively low amount).
What dose the Recolor model after texturing do?(in other words what is the texture missing)
And is there a recommendation on how many textures we should use?
Hi, I have the same issue and I think I’m not the only one. It seems to be something with one of the new versions of RC as all people mentioning it are posting in 2025. I also tried disabling recolor after texturing but I’m still stuck at 71% after processing. What exactly happens there ? And how can we solve this ?
For info, in this stuck step, my CPU is using 100% but no memory, no GPU, and nothing seem to be written in temp folder. Some infinite loop?
I have about 2000 laser positions, 20 000 48MP photos and a model downsized to 100M and 10 textures on fixed texel size.
Hi @syl7h
This is a known bug: Unreal Engine Issues and Bug Tracker (RC-1879) which should be solved in the next release. For now you can try to use the mentioned workaround or use the previous version.
We are sorry for the inconveniences.
How big was the model originally? What were your simplification steps?
Hi, of course opening the project in previous version fails, and it took days to achieve this version so I’m not so happy about the idea of starting all again.
About the project, the model was originally about 4B tris, I then simplified, and did a lot of work to clean it with cut by box, lasso, filter selection, clean model and close holes.
I unwrapped in fixed texel size 0.004 (after trying once 0.002), it gave me 10x16k tx
I tried simplifying the model even more, re unwrapping, but it’s still stuck at exactly 71%.. This week of error is putting me in a delicate situation with my client to be honest, but I’m carrying on trying stuff, maybe is there some possibility of importing component in RC 1.4.2 and importing model, previously exported from 1.5.1 ? or exporting and reimporting model in RC 1.5.1, or disabling images in texturing… What do you suggest ?
As told before, I already tried disabling the “recolor after texturing”, and it doesn’t change anything to me.
Thanks
Edit:
I tried disabling half images, and I waited in front of my computer for the 71% to see if anything changed, and I could notice the memory drop after one sub process.
FINAL Edit:
I then tried exporting the component and the model from RC 1.5.1 to a new 1.4.2 project, retried texturing and it seems to work, from my first low resolution test !
Hi,
as you simplified your 4B model, what was the initial simplification? Have you provided 50% incremental steps until the wanted model size?
How were your data captured (mostly images)? Is it possible that you provided pivoting (taking pictures from one place, as panorama)?
Do you have disabled the laser scans for texturing? What are your texture settings?
I’ve checked the proposed workflow with exporting the component and model and opening it in the older version and it seems to be working (I’ve just used smaller dataset).
Not especially, do you think the way it’s simplified can have an effect on texturing then ? I first got to 500M then 200M, then edit all problematic areas, then 100M, then 50M for the one I’m using now.
The data is about 2500 laser scans, 15 000 drone photos (Mavic 3 E) and 10 000 ground images (Sony a7RIII). I tried disabling laser for texturing and the bug was still there. Texture settings are these:
I unwrapped with fixed texel size with a value of 0.002
I’m currently calculating the high res texture using the export import method, thanks for your help !
Maybe not, but simplification from 4B to 500 M is quite big and there could be some injected errors cause by big simplification.
How the ground images were taken? Can you show some print screen of their alignment?
What is the optimal texel size in your case?