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UE4, Unity, Cesium and Three.js are four commonly used 3D engine software, each of them has unique characteristics and application scenarios. Here is a detailed comparison and analysis of them:

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When using WebGL for data visualisation, there are various performance optimisation techniques that can be taken to improve rendering efficiency and user experience. Here are some common performance optimisation methods. Beijing Muqi Mobile Technology Co., Ltd, a professional software outsourcing and development company, welcome to exchange and cooperation.

3D Tiles is an open specification for sharing, visualizing,fusing, interacting with, and analyzing massive heterogeneous 3D geospatial content across desktop,web, and mobile applications. 3D Tiles is built on glTF, an open standard for efficient streaming and rendering of 3D models and scenes.
3D geospatial content, including photogrammetry/massive, models, BIM/CAD, 3D buildings, instanced features, and point clouds, can be converted into 3D Tiles and combined into a single dataset for seamless performance and real-time analytics including measurements, visibility analysis, styling and filtering. 

How to directly import .dgn format model generated by Bentley software into Unity3D for presentation and logic processing? How to import 3D models generated by industrial CAD software Solidworks directly into Three.js or Cesium to build digital twin applications?
How to convert BIM/industrial 3D model format, but also export the model structure/attribute data simultaneously?
You will definitely look for various conversion tools on the Internet, keep downloading/installing to try and step on the pit, which is time-consuming and labour-intensive, and the result is often unsatisfactory.

Now, Opt Converter product helps you to solve the above needs easily!!!!

OBJ file is a 3D model file format. Developed by Alias | Wavefront company for 3D modelling and animation software ‘Advanced Visualizer’ a standard, suitable for 3D software models between the inter-conductor, but also through Maya read and write.

GLB, which stands for ‘GL Transmission Format Binary file’, is a standardised file format for sharing 3D data. It can contain information about 3D models, scenes, models, lighting, materials, node hierarchies and animations.
When we open the glb file format, you can visualise and interact with the complete 3D scene. This is why it is also known as the JPEG of the 3D asset world.
A GLB file is a binary version of a GLTF file that packages model data (including geometry, textures, materials, etc.) and scene description information in a binary file, usually with a .glb extension. Compared to the text format of GLTF, GLB files have higher loading performance and smaller file size.
Due to its lightweight nature, this format is commonly used for mobile and web applications as well as graphical games, video games, VR and AR applications. GLB files can also be easily shared via email or other file sharing platforms.

The FBX format is supported by almost all 3D engines and is a proprietary format for 3D models developed by Autodesk. It supports vertices, indices, normals, UV coordinates, materials and animations.
Autodesk officially provides the FBX SDK, which allows importing and exporting FBX files or other libraries with the same purpose. The SDK exposes two interfaces, one in C++ and the other in Python.
You can also write custom FBX parsers to avoid dependencies on other libraries.
The structure of an FBX file is described in this article. Understanding it allows us to write a custom, lightweight FBX parser. For examples of custom FBX parsers, you can look up Blender's FBX Importer/Exporter plugin.
The FBX format is available in ASCII (text file, human readable) or Binary.