Are you talking about an internal application where you print and sell 3D models? In that case, there is no royalty because the application is only used internally and what is sold is a physical printed object.
Or, rather are you selling 3D printers with an Unreal Engine-based application shipped with the printer? And is it a customer-facing application or just something internal?
I can’t tell you whether your application meets the definition; you need to read the definition and see for yourself. The main question is whether it uses or is based on the Unreal Engine Editor code.
As for the free to download regardless of whether you’ve bought the 3D printer, you say “I guess” but the answer is critical. If it is indeed free to everyone regardless of whether they’ve bought the printer, and it doesn’t ship with the printer, then there is no royalty.
the reason why i have the idea using UE4 in the first place is.i find these FAQ. it looks like it say UE4 is free to use as a non-game/entertainment application. Do i misunderstand something ?
What does “Unreal Engine for enterprise” mean?
When we talk about “enterprise,” we are simply differentiating between those who use Unreal Engine for games and interactive entertainment applications, and those who use (or are looking to use) Unreal Engine for things like automotive visualisation, architectural visualization (arch viz), data presentations, linear entertainment or any one of a thousand other uses that don’t fit into the wider category of games.
Do enterprise customers receive a better version of UE4 than non-enterprise users?
There is only one version of Unreal Engine 4. All Unreal developers get all features, all source code, and so forth. What’s changed is that Epic now has an enterprise team that is dedicated to working with enterprise customers, who will have access to exactly the same Unreal Engine as the rest of the development community. The way Unreal is being used is rapidly expanding and we’re helping people outside of game development use it for their pipelines.
Does this mean that there is a charge for enterprise use?
Not necessarily. If you fall into the “enterprise” category you can certainly use UE4 under the free EULA with no obligation beyond those terms. However, if your business needs require a different arrangement you can contact us to discuss alternatives, including the option to take advantage of an enterprise support package.