こちらで試せます。
Real-Time Visualizations of Gigapixel Texture Data Sets Using HTML5
http://schumann.elis.ugent.be/
HTML5 Virtual Texturing Demo (MegaTextures in WebGL) | HTML5 Game Development
http://www.html5gamedevs.com/2012/01/19/html5-virtual-texturing-demo-megatextures-webgl/
関連情報
MegaTexture(Virtual Texturing)が凄い - 強火で進め
http://d.hatena.ne.jp/nakamura001/20091206/1260090138
