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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>WorldRover: A Scalable Synthetic Video Data Engine for World Exploration</title>
<meta name="description" content="WorldRover — a data engine for generating richly annotated, long-range explorations of artist-built environments.">
<meta property="og:title" content="WorldRover: A Scalable Synthetic Video Data Engine for World Exploration">
<meta property="og:description" content="A data engine for generating richly annotated, long-range explorations of artist-built environments.">
<meta property="og:url" content="https://alayalab.github.io/WorldRover/">
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</head>
<body>
<div class="grid-bg"></div>
<div class="glow a"></div>
<div class="glow b"></div>
<div class="scroll-progress" id="progress"></div>
<nav class="side-nav">
<a class="home" href="#top"><span class="lbl">WorldRover</span><span class="bar"></span></a>
<a href="#multi-view"><span class="lbl">View</span><span class="bar"></span></a>
<a href="#multi-modal"><span class="lbl">Modal</span><span class="bar"></span></a>
<a href="#multi-style"><span class="lbl">Style</span><span class="bar"></span></a>
<a href="#multi-scene"><span class="lbl">Scene</span><span class="bar"></span></a>
<a href="#multi-character"><span class="lbl">Character</span><span class="bar"></span></a>
</nav>
<main id="top">
<!-- ================= HERO ================= -->
<section class="article-hero">
<div class="wrap hero-grid">
<div class="hero-text">
<h1 class="hero-title"><span class="grad-accent">WorldRover</span></h1>
<p class="hero-sub">A Scalable Synthetic Video Data Engine for World Exploration with Rich Annotations</p>
<p class="hero-authors">
Xiaojie Xu<sup>1,2,*</sup> Zhengyuan Lin<sup>1,2,*</sup> Runyi Li<sup>1,2</sup>
Yihao Liu<sup>1</sup> Kaipeng Zhang<sup>1,†</sup> Yongtao Ge<sup>1,†</sup>
</p>
<p class="hero-affil"><sup>1</sup> Alaya Lab · <sup>2</sup> The University of Tokyo · <sup>*</sup> Equal contribution · <sup>†</sup> Corresponding author</p>
<div class="release-links">
<div class="release-links__title">Resources</div>
<div class="release-links__grid">
<a class="release-link" href="https://arxiv.org/abs/2608.15659" target="_blank" rel="noreferrer"><i class="fas fa-file-pdf"></i> Paper</a>
<a class="release-link" href="https://huggingface.co/datasets/xjxu21/WorldRover" target="_blank" rel="noreferrer"><i class="fas fa-database"></i> Data (preview)</a>
<a class="release-link" href="https://github.com/AlayaLab/WorldRover" target="_blank" rel="noreferrer"><i class="fab fa-github"></i> Code</a>
</div>
</div>
<div class="tldr-card">
<div class="tldr-title">Highlights</div>
<ul class="tldr-list">
<li>A scalable UE data engine that <strong>ingests UE assets, builds multi-style scenes, plans routes, and renders them headless with streaming post-processing</strong>.</li>
<li>The same exploration replayed from <strong>first-person, third-person and 360° panoramic</strong> cameras under different environmental states.</li>
<li>Sequences pair RGB with <strong>metric depth, optical flow, long-range point tracks, camera trajectories and action signals</strong> throughout each exploration.</li>
</ul>
</div>
<div class="stats-grid hero-stats">
<div class="stat-card stat-card--hi"><div class="stat-value">21.9M</div><div class="stat-label">Frames</div></div>
<div class="stat-card stat-card--hi"><div class="stat-value">6,003</div><div class="stat-label">Sequences</div></div>
<div class="stat-card"><div class="stat-value">32</div><div class="stat-label">Environments</div></div>
<div class="stat-card"><div class="stat-value">202.7 h</div><div class="stat-label">Duration</div></div>
<div class="stat-card"><div class="stat-value">18.7 TB</div><div class="stat-label">Volume</div></div>
</div>
</div>
<div class="hero-media">
<div class="media-frame">
<img src="static/images/teaser.jpg" alt="WorldRover-10M at a glance: diverse viewpoints, scene styles and motion labels.">
</div>
<div class="media-frame">
<img src="static/images/engine.gif" alt="WorldRover-Engine pipeline, each stage highlighted in turn: asset processing on a Windows editor host, content generation headless on a multi-GPU Linux host.">
</div>
</div>
</div>
</section>
<!-- ================= 02 MULTI-VIEW ================= -->
<section class="block" id="multi-view">
<div class="wrap reveal">
<h2 class="title">Multi-View</h2>
<p class="title-sub">Three observations of a route with matched timing and geometry.</p>
<div class="shrink" data-sync>
<div class="vgrid half">
<figure>
<div class="stage vid" data-src="static/videos/view/fpv.mp4">
<span class="badge">First-person</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/view/fpv.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/view/tpv.mp4">
<span class="badge">Third-person</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/view/tpv.jpg"></video>
</div>
</figure>
</div>
<div class="vgrid" style="margin-top:16px">
<figure style="flex-basis:100%">
<div class="stage vid pano" data-src="static/videos/view/pano.mp4">
<span class="badge">360° panoramic</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/view/pano.jpg"></video>
</div>
</figure>
</div>
</div>
</div>
</section>
<!-- ================= 03 MULTI-MODAL ================= -->
<section class="block" id="multi-modal">
<div class="wrap reveal">
<h2 class="title">Multi-Modal</h2>
<p class="title-sub">Colour, depth and motion, one rasterization of the same instant.</p>
<div class="vgrid two" data-sync>
<figure>
<div class="stage vid" data-src="static/videos/motion/rgb.mp4">
<span class="badge">RGB video</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/motion/rgb.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/motion/depth.mp4">
<span class="badge">Metric depth</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/motion/depth.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/motion/flow.mp4">
<span class="badge">Optical flow</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/motion/flow.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/motion/track3d.mp4">
<span class="badge">Long-range point tracks</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/motion/track3d.jpg"></video>
</div>
</figure>
</div>
</div>
</section>
<!-- ================= 04 MULTI-STYLE ================= -->
<section class="block" id="multi-style">
<div class="wrap reveal">
<h2 class="title">Multi-Style</h2>
<p class="title-sub">Geometry and motion remain fixed while illumination or texture changes.</p>
<div class="vgrid" data-sync>
<figure>
<div class="stage vid" data-src="static/videos/style/day.mp4">
<span class="badge">Day</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/style/day.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/style/goldenhour.mp4">
<span class="badge">Golden hour</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/style/goldenhour.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/style/night.mp4">
<span class="badge">Night</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/style/night.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/style/snow.mp4">
<span class="badge">Snow</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/style/snow.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/style/storm.mp4">
<span class="badge">Storm</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/style/storm.jpg"></video>
</div>
</figure>
</div>
<div class="vgrid">
<figure>
<div class="stage vid" data-src="static/videos/white/white_venice.mp4">
<span class="badge">White model · Venice</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/white/white_venice.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/white/white_train_station.mp4">
<span class="badge">White model · Train station</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/white/white_train_station.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/white/white_vegetation.mp4">
<span class="badge">White model · Village</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/white/white_vegetation.jpg"></video>
</div>
</figure>
</div>
</div>
</section>
<!-- ================= 05 MULTI-SCENE ================= -->
<section class="block" id="multi-scene">
<div class="wrap reveal">
<h2 class="title">Multi-Scene</h2>
<p class="title-sub">30+ artist-built UE scenes, interior to city scale.</p>
<div class="vgrid">
<figure>
<div class="stage vid" data-src="static/videos/scenes/paris_1.mp4">
<span class="badge">Paris</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/scenes/paris_1.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/scenes/cybertown_1.mp4">
<span class="badge">Cyberpunk</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/scenes/cybertown_1.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/scenes/mayan_1.mp4">
<span class="badge">Mayan</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/scenes/mayan_1.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/scenes/realistic_city_1.mp4">
<span class="badge">Island city</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/scenes/realistic_city_1.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/scenes/art_nouveau_1.mp4">
<span class="badge">Art nouveau</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/scenes/art_nouveau_1.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/scenes/school_of_magic_1.mp4">
<span class="badge">Magic school</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/scenes/school_of_magic_1.jpg"></video>
</div>
</figure>
</div> </div>
</section>
<!-- ================= 06 MULTI-CHARACTER ================= -->
<section class="block" id="multi-character">
<div class="wrap reveal">
<h2 class="title">Multi-Character</h2>
<p class="title-sub">70+ animated humanoids, animals and creatures.</p>
<div class="vgrid">
<figure>
<div class="stage vid" data-src="static/videos/chars/samurai.mp4">
<span class="badge">Samurai</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/chars/samurai.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/chars/archer.mp4">
<span class="badge">Archer</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/chars/archer.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/chars/shadow.mp4">
<span class="badge">Shadow</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/chars/shadow.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/chars/wolf.mp4">
<span class="badge">Wolf</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/chars/wolf.jpg"></video>
</div>
</figure>
<figure>
<div class="stage vid" data-src="static/videos/chars/eagle.mp4">
<span class="badge">Eagle</span>
<video muted loop playsinline webkit-playsinline preload="metadata" poster="static/videos/chars/eagle.jpg"></video>
</div>
</figure>
</div> </div>
</section>
<!-- ================= BIBTEX ================= -->
<section class="block" id="bibtex">
<div class="wrap reveal">
<h2 class="title">BibTeX</h2>
<pre><code>@article{worldrover2026,
title = {WorldRover: A Scalable Synthetic Video Data Engine
for World Exploration with Rich Annotations},
author = {Xu, Xiaojie and Lin, Zhengyuan and Li, Runyi and
Liu, Yihao and Zhang, Kaipeng and Ge, Yongtao},
journal = {arXiv preprint arXiv:2608.15659},
year = {2026},
eprint = {2608.15659},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.15659}
}</code></pre>
</div>
</section>
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