Update index.html

index.html

@@ -153,6 +153,19 @@
         .arcDashGap(() => 0.2)
         .arcDashAnimateTime(() => 2000);
 
+      // Borders
+      fetch('https://unpkg.com/three-globe/example/datasets/ne_110m_admin_0_countries.geojson')
+          .then(r => r.json())
+          .then(({ features }) => {
+            globe
+              .polygonsData(features)
+              .polygonCapColor(() => 'rgba(0,0,0,0)')     // transparent fill
+              .polygonSideColor(() => 'rgba(0,0,0,0)')    // no sides
+              .polygonStrokeColor(() => 'rgba(255,255,255,0.25)')
+              .polygonAltitude(() => 0.002);              // small lift to avoid z-fighting
+          })
+      .catch(() => {/* ignore */});
+
       // Orbit controls tuning (zoom/rotate)
       const ctrl = globe.controls();
       ctrl.enableDamping = true;