# gltf/glb Model Overview

## 1. What is gltf?

* glTF is a format standard for 3D content; 
* glTF is designed for real-time rendering applications, try to provide data formats that can be directly transmitted to the graphics API, no need for secondary conversion; 
* To some extent, we can understand it as a JPEG in the 3D field; 
* glTF uses a set of common parameters to define the material based on physical rendering (PBR); more information about glTF can be found: <https://www.khronos.org/gltf/>

## 2. How does the Kivicube 3D renderer support glTF?

### 2.1 Material

* Support PBR material (Metallic-Roughness Material and Specular-Glossiness Material);&#x20;
* These two materials correspond to the two workflows of PBR materials, namely, metal/roughness workflow and mirror/gloss workflow;&#x20;
* If you are not familiar with PBR material, you can refer to: <https://www.allegorithmic.com/pbr-guide>&#x20;
* Whether to support double-sided display;

### 2.2 Texture

In order to save bandwidth during network transmission, only opaque JPG format and transparent PNG format are supported;

### 2.3 Animation

* Skeleton & Bones<br>

> Rig your model with a skeleton and animate the bones. Great for full body animation.

* Solid<br>

> Animate translation, rotation and scale of your meshes. Ideal for mechanical models.

* Morph Targets<br>

> Morph shapes from one state to another. Great for posing faces.


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