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Three.js vs Unreal Engine VR

Three.js logo

Three.js

AR VR

JavaScript 3D library for WebGL and WebXR

From
Free
Rated
-
Full reviewWebsite
Unreal Engine VR logo

Unreal Engine VR

AR VR

AAA-quality VR development with Unreal Engine

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Three.js forward rendering pipeline only, no deferred rendering support; Unreal Engine VR steep system requirements with demanding GPU and CPU for rendering high-quality VR experiences
  • They diverge on capability: Three.js covers WebGL rendering, Unreal Engine VR covers Photorealistic rendering.

Where they differ

Only the attributes on which Three.js and Unreal Engine VR actually diverge.

Attributes where Three.js and Unreal Engine VR differ
AttributeThree.jsUnreal Engine VR
Pricing modelfreeUnknown
PlatformsWeb, macOS, Windows, Linux, iOS, AndroidWindows, macOS, Linux
Founded20101995

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (AR VR).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Three.js

  • WebGL rendering
  • Scene graph
  • Materials system
  • Animation system
  • WebXR
  • Post-processing
  • Physics
  • Loaders

Only in Unreal Engine VR

  • Photorealistic rendering
  • Physics simulation
  • Blueprint scripting
  • Motion controllers
  • SteamVR
  • Oculus
  • OpenXR
  • PSVR

What people use each for

The jobs each tool is most often brought in to do.

Three.js

  • VR Gaming
  • AR Marketing
  • Virtual Training
  • 3D Visualization
  • Immersive Experiences

Unreal Engine VR

  • VR Gaming
  • AR Marketing
  • Virtual Training
  • 3D Visualization
  • Immersive Experiences

Both are used for vr gaming, ar marketing, virtual training, 3d visualization, immersive experiences, on those jobs the choice comes down to price and fit rather than capability.

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Three.js

  • Forward rendering pipeline only, no deferred rendering support
  • No built-in collision detection or spatial indexing, requiring external physics libraries
  • WebGL dependency means no support for non-WebGL environments

Unreal Engine VR

  • Steep system requirements with demanding GPU and CPU for rendering high-quality VR experiences
  • Only free with 5% royalty after $1 million in revenue, which may impact indie developers at scale

Pricing, plan by plan

Three.js

Free
  • FreeFree
    • Full library
    • WebXR module
    • Examples

Unreal Engine VR

Free

No published plan breakdown. See the Unreal Engine VR review.

Which should you pick?

Choose Three.js if

  • You need webgl rendering.
  • You want to start without paying.
  • You work on Web, macOS, Windows, Linux, iOS, Android.
  • You also want scene graph.
Three.js review

Choose Unreal Engine VR if

  • You need photorealistic rendering.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want physics simulation.
Unreal Engine VR review

Questions people ask

Is Three.js or Unreal Engine VR better?
Neither clearly leads. Three.js starts at Free and Unreal Engine VR at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Three.js or Unreal Engine VR?
Three.js starts at Free and Unreal Engine VR at Free.
Does Three.js or Unreal Engine VR run on more platforms?
Three.js runs on Web, macOS, Windows, Linux, iOS, Android. Unreal Engine VR runs on Windows, macOS, Linux.
Can I use Three.js for free?
Both have a free tier, so you can try either at no cost before committing.
What is Three.js best used for?
Three.js is most often used for vr gaming, ar marketing, virtual training, 3d visualization.
What can Three.js do that Unreal Engine VR cannot?
Three.js covers WebGL rendering, Scene graph, Materials system, Animation system. Unreal Engine VR covers Photorealistic rendering, Physics simulation, Blueprint scripting, Motion controllers.

Answered from the vendors’ own pages

Three.js: Is Three.js free to use?

Yes. Three.js is released under the MIT license, an open-source license that permits unlimited commercial and personal use with no licensing fees.

Source
Unreal Engine VR: Does Unreal Engine support VR and AR development?

Yes. Unreal Engine provides the highest-quality solution for creating augmented reality (AR), virtual reality (VR), and mixed reality (MR) experiences, supporting development for VR, AR, gaming consoles, PCs, and mobile devices.

Source
Three.js: Does Three.js include physics simulation?

No. Three.js is a rendering library only. Physics, collision detection, and spatial indexing must be implemented with external libraries like Rapier, Ammo, or JoltPhysics.

Source
Unreal Engine VR: Is Unreal Engine 5 free to use?

Unreal Engine 5 is free for most uses with no upfront cost. If a project earns over $1 million, a 5% royalty applies to future sales.

Source
Three.js: Can I use Three.js for offline development?

Yes. Local development requires a local web server for CORS compliance. You can use npm with a build tool like Vite, or run a local Python server for development.

Source
Unreal Engine VR: What platforms does Unreal Engine support for VR development?

Unreal Engine supports macOS and Linux development with some limitations, though Windows 10 (64-bit) is the primary development platform. It supports VR development targeting various VR headsets.

Source
Three.js: Does Three.js support WebXR for VR/AR?

Yes. Three.js documentation includes WebXR APIs for building VR and AR experiences in web browsers.

Source
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