1. Scope of the license

While you maintain an active, paid subscription to my commercial print tier on Patreon, you have permission to:

• 3D print physical copies of my original models published on MakerWorld.
• Sell those physical prints to individual customers, in your shop, at in-person events, on online marketplaces (e.g. Etsy, eBay, Shopify, Amazon Handmade, your own website), and through similar direct-to-consumer channels.
• Use photos and videos of your own prints in your listings and marketing materials.
• Use prints for commissions and custom orders.

The license is non-exclusive, non-transferable, revocable, and worldwide. It is granted to one seller — one person, one store, or one business profile — and may not be shared, sub-licensed, or assigned.

The license is royalty-free for sales: I do not charge a per-print fee. Your subscription is the only fee you owe me.

2. Models covered

This license applies only to original models published under my account at makerworld.com/@marcorei. It does not apply to:

• Remixes or derivative works that I have published of someone else's design.
• Models from other creators, even if I have remixed or printed them.

If a model on my profile is marked as a remix or derivative, treat it as not covered, and ask me in writing before selling prints of it.

3. No reselling or sharing the digital files

You may not share, resell, redistribute, sub-license, host, transfer, or otherwise make available the 3D model files (.stl, .3mf, .step, etc.) or any digital derivative work, in whole or in part, on any platform or to any third party. This includes:

• Re-uploading to MakerWorld, Printables, Thingiverse, Cults3D, Thangs, or any other model platform.
• Sharing privately with friends, customers, employees, or contractors who are not themselves subscribed to my commercial tier.
• Selling printed-but-still-digital outputs such as slicer projects, packaged GCODE, or paid downloads.
• Selling molds, casts, or any other reproduction master derived from the files.

Redistribution of the digital files is the single fastest way to lose this license permanently and forfeit the sell-off period in section 11.

4. Production limits

This license is for 3D-printed physical objects only. Without my prior written approval you may not:

• Cast, mold, or otherwise reproduce the design using injection molding, resin casting, silicone casting, vacuum forming, slip casting, or any similar mass-replication technique.
• Mass-produce for mass-market resale (e.g. supplying retail chains, wholesale distributors, or brand-name resellers).
• Outsource printing to a third-party manufacturer or print farm that is not itself an active subscriber to this license tier.
• Use drop-shipping arrangements that route fulfillment through third-party manufacturers.

You are expected to print the items yourself, on equipment you own or operate. If you'd like to work with a print partner (for example, a local maker friend), please ask in writing first — I'll usually say yes for small-scale, hobby-grade arrangements.

The following platforms are explicitly out of scope for this license: Temu, Alibaba, AliExpress, Wish, and any other large-scale mass-market or drop-shipping marketplace. Listings on those platforms will be treated as a material breach.

5. Attribution

You must clearly state in your product listings that the model is a licensed design by marcorei and include a link to my MakerWorld profile:

Design by marcorei, printed and sold under a commercial license.

Where the platform allows it, link directly to my profile. Where links aren't allowed (e.g. some marketplace formats), the plain-text credit is enough.

You may not present yourself or your products as "official", "authorized", "endorsed by", "partnered with", or "produced by" marcorei, and you may not use my logo, branding, or visual identity. You are running a fully licensed business — you just can't use my brand as your brand.

6. Adaption (no changing the geometry)

You may not modify the geometry of my models without my explicit permission, except that you may freely:

• Adjust the scale of the item.
• Choose the material (filament, resin, color, finish, etc.).
• Choose your own print settings (layer height, infill, supports, multi-material assignments, etc.).

Cosmetic changes to color and material are always fine and can genuinely help your listings stand out. Anything that changes the form itself — cutting parts, merging parts, adding new features, kit-bashing with other models — needs a written OK from me first. Ask me; I'm usually happy to help if it's a clean idea.

7. Do not use my photos, videos, or descriptions

My MakerWorld photos, renders, videos, and product descriptions are not included in this license. Don't reuse them in your listings.

Use photos of your own prints instead. Beyond the licensing reason, this is also good business advice: most online marketplaces are actively cracking down on duplicate stock imagery, and listings with original photos consistently convert better than listings that all use the same hero shot.

8. No crowdfunding

You may not use prints of my models, or images of them, as products, backer rewards, or promotional items in Kickstarter, Indiegogo, GoFundMe, or any other crowdfunding campaign without my written permission.

This is mostly about brand and category fit — I'd rather have a quick conversation up front than be surprised by a launch page.

9. Pricing and quality

You set your own retail prices. I won't tell you what to charge.

You're also fully responsible for the quality, safety, packaging, and support of the physical items you sell, and for complying with all applicable laws — including consumer-protection, product-safety, labeling, and tax obligations in your jurisdiction. I'm the designer, not the manufacturer; the buyer's contract is with you.

10. Subscription, billing, and changes

• The license is valid for as long as your subscription to my commercial print tier on Patreon is active and paid.
• Your subscription auto-renews monthly through Patreon. You can cancel any time in your Patreon settings; your license stays active through the end of the billing cycle you've already paid for, and then ends.
• I may update the terms of this license from time to time. When I change anything material, I'll publish a short note about it as a Patreon post visible to subscribers of the commercial print tier. Updated terms apply to your subscription from your next billing cycle after that post.
• If I retire the commercial tier or stop offering commercial licenses altogether, your license remains valid through the end of your current billing cycle, followed by the sell-off period in section 11.

11. End of license and sell-off period

The license ends when your subscription ends — whether you cancel, miss a payment, or I revoke the tier. On that date:

• You must stop printing new copies of my models for sale.
• Existing physical inventory that you have already printed may be sold for up to 30 days after the subscription end date, so you can clear stock honorably without losses.
• After those 30 days, listings of my models must be removed or relisted as "out of stock" / "no longer available", and any remaining inventory may not be sold, gifted, or transferred to another seller.
• You must keep all digital files private and may not redistribute them at any point, before, during, or after the subscription.

In the case of a material breach of this license — for example redistributing the digital files, selling on banned platforms, or fraudulent attribution — the 30-day sell-off period does not apply. The license is revoked immediately, all sales must stop, and listings must be taken down within 7 days of notice. I also reserve the right to pursue platform-level takedowns and any other remedies available under applicable law.

12. Misc

• This license is between me (Markus Riegel, trading as marcorei) and you, the subscribing seller. Patreon and MakerWorld are not parties to it — Patreon is the billing platform, MakerWorld is the hosting platform for the models, and neither speaks for me on licensing matters.
• If any part of this license turns out to be unenforceable in your jurisdiction, the rest still applies.
• I'm based in Munich, Germany. If we ever need to fall back on a jurisdiction or governing law, German law applies. See my imprint for legal contact details.
• For any question this document doesn't answer — sourcing, partnerships, specific platforms, custom commissions — just write to me: [email protected]. I'd much rather have a short conversation than discover an issue later.