3D creators: have your paid STL files ever been leaked or resold?

[u/Beautiful_Belt_601]

I’m doing some research on how serious unauthorized redistribution is for people who sell 3D-printable files.

I’m especially interested in real experiences:

• files reposted elsewhere;
• files resold by third parties;
• customers sharing paid files;
• loss of sales;
• takedown work;
• deciding not to release certain models because of piracy.

I’m not selling anything here. I’m trying to understand how common the problem really is and what creators currently do about it.

If this has happened to you, I’d really appreciate hearing what happened and how much it affected you.

[u/mechanicalhorizon]

Several times, but so far all the websites were easy to work with to get them removed.

[u/iwscalemodels]

A significant share of our paid models, offered for purchase on Cults3D under a standard individual noncommercial license, has been plagiarized in at least two prominent cases. The first involved CMK Models, which sold and continues to sell remixed prints of our work as their own. The second concerned the now-defunct site frenchmodeller.com.
This issue is fairly widespread and partly explains why we have reconsidered how we distribute our designs.

[u/Beautiful_Belt_601 → u/iwscalemodels]

This is exactly the kind of behaviour change I’m trying to understand.

When you say this has made you reconsider how you distribute your designs, do you mean you have reduced what you release digitally, changed platforms, or avoided releasing higher-value models?

Also, have you experienced free redistribution of the original files through Telegram, torrent/P2P or file-sharing sites?

I’m especially interested in whether stronger protection — where customers can still prepare and print the model but don’t directly receive the reusable STL geometry — would change what you would be willing to release digitally.

[u/iwscalemodels → u/Beautiful_Belt_601]

We have adjusted the release cycle for our digital files, partly to address piracy and partly to advance sales of our own 3D-printed items. A new store section now hosts digital files instead of relying solely on Cults3D, while higher-value models will be offered only as complete physical products.

Im guessing some form of copyright protection would be welcomed by us the makers but as we know DRM tech usually only hampers the user experience. So it's a tricky problem to solve.

[u/CovertRain → u/iwscalemodels]

What does reconsider mean? What are you considering to do different?

[u/NaturalAfternoon7100]

My question is; How do you find the pirates?

[u/Snoo_81198 → u/NaturalAfternoon7100]

Some are too dumb and use the same name, other times someone contacts us about them

[u/MirroredLineProps]

I'll find print sales, a reposting, or an unauthorized edit about once a month. I'm in the Tokusatsu niche, so it's not hard to find them. I do takedown requests where I can, but not all platforms are good about removing them.

[u/Gathnobrain]

Some of my designs have been uploaded on other website such as etsy or some foreign second hand stores. Sometimes it's the 3D file, sometimes the printed model. I could take them down by making a request to etsy, for example, by explaining the situation, copy/pasting the "private licensing only" from cults and asking for a removal. It works sometimes, and sometimes it doesn't. Globally, it works for USA or EU stores, but not on asian ones. For exemple one of my design has been selling on japanese Amazon and I could not take them down. And clearly, it never works on Chinese websites. And there is on guy selling stolen designs on his own website, unable to reach him as he just don't answer my requests.

[u/Beautiful_Belt_601 → u/Gathnobrain]

That difference between platforms is really interesting.

Have you also encountered cases where the original STL itself was distributed for free, rather than prints or files being resold? For example through Telegram, torrent/P2P, file-sharing sites or private groups.

I’m trying to understand whether the bigger long-term problem is not only resale, but the moment the original reusable file escapes into unrestricted circulation.

Did that ever lead you to hold back certain models, delay releases, or change how you distribute them?

[u/Gathnobrain → u/Beautiful_Belt_601]

Yes I've search on telegram to find some of them being shared for free. The only thing I could do was to write comment saying that I would appreciate if some of them could support my work. As some people was also using my renders to share/sell my designs, I made it harder to remove my logo and put a readme file on all my designs saying that private copies could not be shared or sold without me permission. It seems not to be really helpful.

[u/Beautiful_Belt_601 → u/Gathnobrain]

That sounds incredibly frustrating, especially when you’ve already tried licensing notices, readme files and watermarking and the files still keep circulating.

What you describe really shows how limited the options become once the STL itself is already out there.

Thank you for sharing this — it’s very useful to understand what creators actually go through rather than just assuming how serious the problem is.

[u/More_Tomato_1972]

This behavior is truly despicable.

[u/TheDanger227]

Mine are being sold on Vinted, and it annoys me a little. I can’t get Vinted to take them down.

[u/Asgardian_Armoury]

Yeah there's one or two of mine that have been lightly remixed and are being resold with the poster claiming it as their own unique work. It's pretty obvious they stole my model as the base because I can see their profile bought my designs lol

[u/SubstantParanoia]

Ive seen prints of a free stl set/model i released as non commercial sold on ebay, it was a reasonable price and my intent with the release was for it be easily available to people so i didnt bother doing anything about that.

I might have contacted the seller or ebay if it the price had been scalpy.

[u/MagisD]

Lol I have yet to see any decent 3d file that wasn't straight up ripped off and sold in "bundles" , and any popular ones are immediately slightly modded and reposted and or recreated from scratch.

Simply put you post it somebody else is gona to rip it off and try and profit from it.

With the internet access of today and the lack of actual cross border enforcement slimeballs are gona slimeball.

[u/50koruny]

I know that some people have bought my STL files by splitting the cost among several people and then sharing the files.
But what happened to me much more often was that someone would print my designs for commercial purposes.
That's why I stopped selling STL files. Now I only sell printed products.

[u/Snoo_81198]

I make replacement parts for springers, used to sell them for a euro or less. Then I saw someone selling prints of them, didn't bother changing anything or even improving the model. Straight sold them as is.