The right source for a 3D model depends on who needs to own the result. Stock 3D models are fast and cheap but non-exclusive. AI-generated models come with uncertain copyright. Commissioned models cost more, but they can give the client exclusive, accurate assets to reuse. Agencies that choose on budget alone often learn the difference when the brand asks who else can use the same model.
Why does the sourcing decision matter more than it used to?
3D has moved from special projects into routine production. As early as 2014, IKEA revealed that around 75% of its product images were computer-generated rather than photographed. Product launches, packaging mock-ups, configurators and social content now often start from a 3D file. Once the model becomes the master asset for a whole campaign, the way it was sourced decides what the agency can promise the client.
What are the limits of stock 3D models?
Stock 3D models give agencies speed, and for backgrounds, props and generic furniture they are usually the sensible choice. The catch is the licence. TurboSquid's royalty-free licence, one of the most widely used, notes that stock products may be sold repeatedly to other customers and bars their use in any business logo. The same chair can appear in a competitor's campaign next month. Models that carry third-party brands or trademarks are further limited to editorial use. For a hero product, none of this is acceptable.
Can an agency rely on AI-generated 3D models?
For concepting, yes. AI tools now turn a prompt or a photo into a rough mesh within minutes. Ownership is less certain. In the US, the Copyright Office concluded in January 2025 that prompts alone do not make the user an author; protection depends on human control over the expressive elements. The UK takes a different approach. Its Copyright, Designs and Patents Act 1988 protects "computer-generated works" for 50 years and names as author the person who made the arrangements for the work to be created. No court has yet tested how that rule applies to generative AI. In March 2026 the government proposed removing it, although no legislation has followed. For an agency, that means a generated asset may or may not be protectable, depending on the market and on how much human work went into it.
Build quality is the second problem. Generated meshes are rarely built to real-world dimensions or clean enough to animate, so they often need rebuilding before production.
When is a custom 3D model worth the cost?
A custom model is worth it when the object is the message. That means the client's own product, a building that does not exist yet, or anything reused across stills, animation and real-time. A commissioned model is built from the client's CAD files, drawings or scans, so its proportions match the real object. It can also be exclusive, provided the contract assigns the rights to the client and rules out resale.
The economics improve with reuse. One accurate model can feed packshots, a launch animation, an AR preview and next year's seasonal variants, each without a new shoot. A stock model that has to be heavily modified for every job can end up costing more over a campaign than one built properly once.
Evermotion, a Polish studio best known for libraries such as Archmodels, keeps commissioned work and stock apart in its custom 3D modelling services. The company says commissioned models are never resold or added to its 18,000+ asset library, and the client receives full commercial rights. The library still has a role: supporting props come from it under its standard licence, while artists concentrate on the exclusive hero object.
What should a brief for a custom 3D model include?
Most disputes over commissioned models start with a thin brief. Six points prevent the common ones:
- Source data. CAD files, technical drawings, reference photos or physical samples. The better the source, the fewer revision rounds.
- Every intended use. A model built for close-up stills differs from one built for animation, a web configurator or AR. Topology, polygon count and textures follow the use, so list all of them up front.
- Formats and software. Name the 3D package, render engine and exchange formats the agency's pipeline needs before production starts: FBX or OBJ for most 3D tools, glTF or USDZ for web and AR.
- Rights in writing. State whether rights are assigned or licensed, whether the model is exclusive and whether the studio may resell or reuse it.
- Editable files. Agree that the editable working files are delivered, not only renders, so later variants do not depend on the original studio.
- Revisions and checks. Fix the number of revision rounds and how accuracy will be checked against the source data.
How should agencies split 3D sourcing?
A practical rule is to source each model by its role in the frame:
- Hero object (the client's product, building or vehicle): custom, built from source data, with rights agreed in writing.
- Supporting props and environments: stock, after checking that the licence covers the intended use.
- Early concepts and moodboards: AI tools, treated as sketches rather than deliverables.
A single project often mixes all three sources, so keep a simple asset register: one row per model, with its source, licence and permitted uses. When the client or its legal team asks what the client owns, the agency can answer in minutes rather than days.
Agencies that write this split into their briefs avoid two expensive surprises: a competitor using the same hero model, and a generated asset the client cannot protect.
