skyboxImage property
Sets the background image of the scene. Takes a URL to an equirectangular projection image that's used for the skybox, as well as applied as an environment map on the model. Supports png, jpg and hdr (recommended) images.
<model-viewer>
official document: https://modelviewer.dev/docs/#entrydocs-lightingandenv-attributes-skyboxImage
Implementation
final String? skyboxImage;