new MinMaxGUIHelper(light.shadow.camera, 'near', 'far', 0.1);
+  folder.add(minMaxGUIHelper, 'min', 0.1, 50, 0.1).name('near').onChange(updateCamera);
+  folder.add(minMaxGUIHelper, 'max', 0.1, 50, 0.1).name('far').onChange(updateCamera);
+  folder.add(light.shadow.camera, 'zoom', 0.01, 1.5, 0.01).onChange(updateCamera);
+}
</pre>
<p>We tell the GUI to call our <code class="notranslate" translate="no">updateCamera</code> function anytime anything changes.
Let's write that function to update the light, the h