glTF Overview

glTF

Runtime 3D Asset Delivery

glTF™ (GL Transmission Format) is a royalty-free specification for the efficient transmission and loading of 3D scenes and models by applications. glTF minimizes both the size of 3D assets, and the runtime processing needed to unpack and use those assets. glTF defines an extensible, common publishing format for 3D content tools and services that streamlines authoring workflows and enables interoperable use of content across the industry.

Participate in the glTF Community

glTF is run as an open project by Khronos. The specification, supporting materials and source code is developed and made freely available on GitHub.

Everyone is welcome to contribute to the code and provide feedback about the specification; you do not have to be a Khronos member to participate in the glTF community. Visit the "Ways to contribute to glTF" page in main glTF project on GitHub.

glTF Demo

‘Project “Polly” was produced to introduce all new features from glTF 2.0: Skinning, morphing and Physically Based materials are used in the demo. ‘Poly’ was developed using Blender and is used to test its glTF 2.0 exporter. The original Blender file will be provided to the glTF community for free!’

glTF is the "JPEG of 3D"

glTF is the JPEG of 3D

 

glTF 2.0 Scene Description Structure

The glTF Structure

Metallic-Roughness Material model

  • baseColor — base color
  • metallic — metalness
  • roughness — roughness
  • Simple to implement - mandated in core

Specular-Glossiness Material model

  • diffuse — reflected diffuse color 
  • specular — specular color
  • glossiness — glossiness
  • Slightly more resources - optional extension

glTF Ecosystem

glTF 3D Asset Formats Ecosystemt

Industry Support for glTF

Publicly stated support for glTF

Join the Slack group Join the forums

glTF™ (GL Transmission Format) is a royalty-free specification for the efficient transmission and loading of 3D scenes and models by applications. glTF minimizes both the size of 3D assets, and the runtime processing needed to unpack and use those assets. glTF defines an extensible, common publishing format for 3D content tools and services that streamlines authoring workflows and enables interoperable use of content across the industry.

Specification

Please provide spec feedback by submitting issues. For technical or art workflow questions, or to showcase your work, join the glTF forum. For quick questions, use the #gltf channel in the Khronos Group Slack.

Quickstart

Overview

From github.com/javagl/gltfOverview/ | PDF | hardcopy | Khronos reference cards
Japanese translation by Takuto Takahashi

For developers

For artists

Preview tools

Contents

glTF Tools

Tools, applications and libraries for working with glTF can be found in the glTF Project Explorer.

Resources

  • glTF-Generator-Registry - An open registry of tools that create glTF assets, along with structured metadata such as links to documentation and bug trackers.

Formats Built on glTF

  • 3D Tiles - An open standard for streaming and rendering massive heterogenous 3D content.

Stack Overflow

Presentations and Articles

Intros

Tutorials

All Presentations and Articles


We believe the true usefulness of glTF goes beyond the spec itself; it is an ecosystem of tools, documentation, and extensions contributed by the community. You are encouraged to get involved!

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