Reall3dViewer

Reall3dViewer is a Three.js-based Web renderer for 3D Gaussian Splatting (3DGS). It focuses on large‑scene streaming rendering, adaptive LOD, and cross‑platform high‑performance optimization, providing high‑performance Web rendering support for enterprise‑grade 3DGS applications.

📋 Table of Contents

• Features
• Benchmarked Performance
• Live Demos
• Key Configuration Parameters
• SPX High‑Compression Format
• Quick Start
• Changelog
• Acknowledgements
• Contact & Support

---

✨ Features

• ✅ Multi‑format support: .ply, .splat, .spx, .spz, .sog, .glb (with KHR_gaussian_splatting extension)
• ✅ Built‑in measurement & annotation: distance, area, flexible labeling
• ✅ Spherical harmonics: supports SH degree 1–3
• ✅ Map scene rendering: GIS basemap integration
• ✅ Per‑model independent configuration: via .meta.json files
• ✅ Adaptive rendering quality: multiple quality levels, auto‑optimized per device
• ✅ Multiple sorting algorithms: choose optimal strategy for different scenes
• ✅ Large‑scene streaming: preset‑based LOD, smooth loading for 100M+ points

🚀 Benchmarked Performance

Tested on a 150‑million‑point scene: Desktop (discrete GPU) 60 FPS, iGPU laptop 30 FPS, modern smartphone 25‑40+ FPS, older smartphone 7‑15+ FPS – stable, no overheating, no crashes.

🌐 Live Demos

• LOD large scene with debug panel
• Complete indoor exhibition LOD large scene

You can also load your own model via URL parameter:
https://reall3d.com/reall3dviewer/examples/index.html?url=your-model.sog&debug=true

⚙️ Key Configuration Parameters

Parameter	Recommended Default (Mobile/PC)	Description
maxRenderCountOfMobile	2 million	Max rendered points on mobile, adjustable per device
maxRenderCountOfPc	3 million	Max rendered points on PC
qualityLevel	auto	Quality level (1–9), affects rendering precision & performance
sortType	auto	Sorting algorithm type, choose different strategy per scene

📦 SPX High‑Compression Format

• Size advantage: reduces file size by >95% compared to PLY, significantly faster loading.
• Streaming rendering: native support for LOD tiling and streaming.
• Conversion tool: cross‑platform CLI tool gsbox (portable, no installation required).

# Convert PLY to SPX
gsbox ply2spx -i input.ply -o output.spx

• SPX format specification
• gsbox repository

🛠️ Quick Start

Using the source code

# develop
npm run dev

# build
npm run build

# open a web browser to render your 3dgs model
# http://hostname:port/index.html?url=your-model-link-address

# .sog or .spx file can be obtained through conversion using the gsbox
gsbox ply2sog -i /path/to/input.ply -o /path/to/output.sog
gsbox sog2spx -i /path/to/input.ply -o /path/to/output.spx

Using the npm package example project

# install
npm install @reall3d/reall3dviewer

// use built-in viewer
const viewer = new Reall3dViewer({ root: '#gsviewer' });
viewer.addModel(`https://reall3d.com/demo-models/yz.spx`);

// preset-lod rendering
const viewer = new Reall3dViewer({ root: '#gsviewer' });
viewer.addScene(`https://reall3d.com/demo-models/lod-v1/hgd/hgd-lod.scene.json`);

// use splat mesh
const splatMesh = new SplatMesh({ renderer, scene, controls});
splatMesh.addModel({ url: 'https://reall3d.com/demo-models/yz.spx' });
scene.add(splatMesh);

📜 Changelog

See Releases for version history.

🙏 Acknowledgements

Thanks to the following open‑source projects for reference implementations:

• antimatter15/splat
• mkkellogg/GaussianSplats3D
• huggingface/gsplat.js
• playcanvas/supersplat
• sxguojf/three-tile

📬 Contact & Support

• Issues：Please submit questions and suggestions on the GitHub project page
• Services：Model format optimization, IP protection, customization, and other enterprise services
• Website：https://reall3d.com