diff --git a/src/cameraSync.js b/src/cameraSync.js
index c2ca8b6..39ca0fc 100644
--- a/src/cameraSync.js
+++ b/src/cameraSync.js
@@ -23,7 +23,12 @@ export function syncCameras(potreeViewer, cesiumViewer) {
   const cUp = Cesium.Cartesian3.normalize(
     Cesium.Cartesian3.subtract(cUpTarget, cPos, new Cesium.Cartesian3()),
     new Cesium.Cartesian3()
-  )
+  ) 
+
+  // Hide globe when camera is below surface
+  const camHeight = Cesium.Cartographic.fromCartesian(cPos).height
+  cesiumViewer.scene.globe.show = camHeight >= 0;
+  cesiumViewer.scene.skyAtmosphere.show = camHeight >= 0;
 
   cesiumViewer.camera.setView({
     destination: cPos,
@@ -41,4 +46,4 @@ export function syncCameras(potreeViewer, cesiumViewer) {
     const fovx = Math.atan(Math.tan(0.5 * fovy) * aspect) * 2
     cesiumViewer.camera.frustum.fov = fovx
   }
-}
+}
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