X3D version 4.0 was approved by Web3D Consortium and ISO in 2023.[/X3D, diagnostic]
X3D version 4.0 offers many new features including interoperability with HTML5, glTF
2.0 Physically Based Rendering (PBR), and Web Audio API.[/X3D, diagnostic]
<meta name='info' content='HelloWorldCommented.json is most current, HelloWorldCommentedOriginalEncoding.json
and HelloWorldCommentedAlternativeEncoding.json were experimental.'/> [/X3D/head/meta[6], diagnostic]