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]
<ExternProtoDeclare name="FlowerProto"/> url array address(es) missing online http
references [/X3D/Scene/Group/ExternProtoDeclare, info]