<X3D profile='Immersive'> is satisfactory for this model - also ensure that child Inline models do not exceed this profile/component combination, since this parent scene must have an equal or higher combination X3D version 4.0 was approved by Web3D Consortium and ISO in 2023. X3D version 4.0 offers many new features including interoperability with HTML5, glTF 2.0 Physically Based Rendering (PBR), and Web Audio API. <ExternProtoDeclare name="ViewFrustum"/> url array address(es) missing online http references <Inline DEF='GridXZ'/> url array address(es) missing online http/https references (url='"GridXZ_20x20Fixed.x3d"') <Inline DEF='CoordinateAxes'/> url array address(es) missing online http/https references (url='"CoordinateAxes.x3d"')