r } = threelet;
        render(); // first time

        const ioToken = 'pk.eyJ1IjoiamRldmVsIiwiYSI6ImNqemFwaGJoZjAyc3MzbXA1OGNuODBxa2EifQ.7M__SgfWZGJuEiSqbBXdoQ';
        const tgeo = new ThreeGeo({
            tokenMapbox: ioToken, // <---- set your Mapbox API token here
        });

        if (!window.location.origin.startsWith('https://w3reality.github.io') && tgeo.tokenMapbox === ioToken) {
            const warning = 'Please set your Mapbox API token in ThreeGeo constructor.';
            alert(warn