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='Correct definition and compliance of this conformance scene is maintained by the X3D Working Group, https://www.web3d.org/working-groups/x3d'/> [/X3D/head/meta[6], diagnostic]