I created a website so that people could create color lithophanes that actually matched the color profile for bambu’s cmyk filament. To my surprise it rejected my print profile because the quality is too good? I’m supposed to “simplify the model or use a larger slicing layer height”. That would completely defeat the purpose of creating the color lithophane profile in the first place. I’m just confused why bambu makes these great printers, but doesn’t want high quality models to show them off? Would love to hear an official explanation, would love even more for this restriction to be dropped. Fortunately my 0.4mm nozzle profile was able to slip through and I could add the 0.2 profile as an additional file but that wasn’t how I wanted it to be. Mario color lithophane created by ptpcreate.com by Pattern to Print - MakerWorld
So if it doesn’t slice on their cloud slicer they reject it? I would suggest there be a “can’t be sliced in the cloud” warning rather than an outright rejection because this is going to take out the best models. I can’t imagine anything I would upload that would survive being sliced in the cloud instead of on a computer.
This is exactly how Mosaic killed their Palette 3. They stopped support for the desktop slicer but the cloud slicer couldn’t handle the good models.
Hello and welcome!
I also make lithophanes, have to admit that the idea of making lithos with a 0.2 nozzle is a bit amusing, yes they are more accurate but it takes an incredibly long time to print. 0.4 is really good in my opinion.
As i little checking your site it doest have custom sizing yet. normal Output is automatically sized to the (108mmx144mm) Bambulab frame, my opinition dont see any problem printing of this size 0.2 nozzle if someone want make its about 8-9 hours ?!? never tried yet.
And thankyou for sharing your site, going beta test your tools at near future what i tried looks great output.
I will say that color lithos with a 0.4 nozzle look pretty good, I did them that way for years. I will also say that if you compare the same litho, one with a 0.4 and one with a 0.2 nozzle, the quality improvement of the 0.2 is quite noticeable. Since the printer is doing the work I find the longer print time to be a very acceptable trade off for a better looking end product.
Just for reference the mario color litho has a print time of around 16 hours. The longest color litho print I have done was around 48 hours and the output was well worth the time.
How big are your mesh files? I’ve been doing 5 color lithos with seven color layers at .07mm. I use .4mm nozzle, but use .3mm line width in the slicer. Size for all the meshes is ~500MB. I’ve been able to upload projects with four plates.
It’s not the file size that is the issue, the mario ones combined are about 100mb. It’s the 0.2 nozzle with 0.05 layer height for the litho part (0.07 for the color like you have) that really adds to the time. With color lithos being printed flat I prefer to do as thin of layers as I can get away with.
I’m not clear about you putting them on 4 separate plates, I thought to slice the litho at once it had to be loaded in as one unit. Not doubting the solution, just not an expert in the subject.
My bad. I mean I can load 4 lithophanes on different sheets in the same project. My slice time in studio (for each plate) is typically under a minute. .2mm texture resolution and .3mm color resolution. But I always use .4mm nozzle. Print time for 4 and 5 color 144x108 lithos is about 8 to 9 hours.
How long do they take to slice locally?
I assume the limit is down to user experience.
Remember MakerWorld is aimed at the masses for simple one click printing. If a user clicks print on their phone and has to wait 5-10 minutes for the model to slice then download to their printer then it’s not a great experience for the user as the majority will just not understand the complexity of the slicing running behind the scenes.
So I guess Bambu has decided to prioritise UX and also prevent complex models from hogging server time.
Hi @JasonPTP ,
First of all, thank you for this beta and for your pioneering work over the years. You’re somewhat the father of color lithophanes 
. It was actually by watching a few videos discussing your work that I decided to create my own color lithophane program (frustrated by the limitations of lithophanemaker).
To get back to the subject of this thread, here’s what Makerworld support replied to me when I opened a support ticket.
Thanks so much for your time and patience.
After our review, we are currently unable to optimize this model upload for the time being, it has too many triangles.We are actively working to improve our platform features and enhance your experience.
Thanks for your understanding.
Best regards,
MakerWorld
Looking at what your program generates, I see that your texture plate has a very high/detailed texture (360 triangles per mm3). I think the issue stems from there. Until Makerworld changes its cloud calculation, I think you’ll have to compromise on the resolution of your texture plate if you want people to be able to share on Makerworld the lithophanes created by your program.
@gaugo thanks for your kind words.
Once I get a handle on things choosing the resolution of the lithophane will be one of the options. I do have it set pretty high now, much higher than the lithophanemaker default(0.1 vs. 0.25).
I had the same issue with a vase id compiled using makerlab ,i thought the issue may of come from the printing detail itself, as i propably went a little ott , and it took 20 minutes or so just to slice and 14hrs to print , but it did allow me to upload a raw file
,the way i look at it, is, as a little resource heavy for the cloud itself , or just a simple time limit in veryfying it as a safe to use 3mf.
This is the way 
Neiljt is right. Just upload the .stl and don’t upload a 3mf or print profile. You will get points for the downloads. If you want to hit both bases, upload the stl and in your description explain that the stl is higher resolution and upload a lower resolution print profile as well.
Thanks all for your strategies to mitigate the issue. The main thing point for me was to upload the slicing profiles for people to use, if I put a really small litho in there and real stl files separately that will probably fix the issue in the future.
I did try to re slice the file - 50% ( something like that ) but i recieved the same time limit message with try different layer height (0.2) , but i dont really understand how it would or want to change the detail of the original , so i left it as is with the raw file direct from makerlabs make a vase template .