diff --git a/doc/changelog.d/143.added.md b/doc/changelog.d/143.added.md
new file mode 100644
index 00000000..b7247c34
--- /dev/null
+++ b/doc/changelog.d/143.added.md
@@ -0,0 +1 @@
+[Remote rendering 3.3d] sync camera to server on orientation widget
diff --git a/src/ansys/visor/visor-client/src/jest-tests/CameraGestureTracker.test.js b/src/ansys/visor/visor-client/src/jest-tests/CameraGestureTracker.test.js
index 4895803e..318512f5 100644
--- a/src/ansys/visor/visor-client/src/jest-tests/CameraGestureTracker.test.js
+++ b/src/ansys/visor/visor-client/src/jest-tests/CameraGestureTracker.test.js
@@ -211,6 +211,23 @@ describe('CameraGestureTracker', () => {
         expect(onSettled).toHaveBeenCalledWith('programmatic');
     });
 
+    // ---- the orientation widget's mark --------------------------------------
+
+    test('a camera event followed by the widget mark within 300 ms reports gesture', () => {
+        // The widget's mark can arrive after the camera events it belongs
+        // to, so this exercises the retroactive branch of noteWidgetGesture.
+        // The mark-first order is covered by the wheel test above, via the
+        // same #markImpulse code path.
+        tracker.noteCameraEvent();
+        jest.advanceTimersByTime(299);
+
+        tracker.noteWidgetGesture();
+        jest.advanceTimersByTime(300);
+
+        expect(onSettled).toHaveBeenCalledTimes(1);
+        expect(onSettled).toHaveBeenCalledWith('gesture');
+    });
+
     // ---- listener management and teardown ----------------------------------
 
     test('the remover returned by addSettledListener stops reports', () => {
diff --git a/src/ansys/visor/visor-client/src/jest-tests/WasmRendererWidgetTriggers.test.tsx b/src/ansys/visor/visor-client/src/jest-tests/WasmRendererWidgetTriggers.test.tsx
index 0ce6a698..89be55cf 100644
--- a/src/ansys/visor/visor-client/src/jest-tests/WasmRendererWidgetTriggers.test.tsx
+++ b/src/ansys/visor/visor-client/src/jest-tests/WasmRendererWidgetTriggers.test.tsx
@@ -103,7 +103,14 @@ function makeFakeWasmObjects() {
         SetOrigin: jest.fn(async () => undefined),
         SetNormal: jest.fn(async () => undefined),
     };
-    return { actor, property, widget };
+    // The orientation widget is its own double, not the shared `widget`
+    // above. Both are observed on `EndInteractionEvent`, and one double for
+    // both cannot tell those two registrations apart: the plane's own test
+    // asserts exactly one such registration, and would see two.
+    const orientationWidget = {
+        observe: jest.fn(),
+    };
+    return { actor, property, widget, orientationWidget };
 }
 
 /**
@@ -137,6 +144,10 @@ async function makeRenderer(
         canvasDiv: document.createElement('div'),
         render: jest.fn(),
         clearObserversAndEventListeners: jest.fn(),
+        // The tracker itself is `#private` to VtkScene, so what the renderer
+        // can reach is this one passthrough, and this is what the orientation
+        // registration is pinned against.
+        noteWidgetGesture: jest.fn(),
         camera,
         getVtkObject: (wasmId: number) => {
             switch (wasmId) {
@@ -144,6 +155,8 @@ async function makeRenderer(
                     return objects.actor;
                 case PROPERTY_ID:
                     return objects.property;
+                case ORIENTATION_WIDGET_ID:
+                    return objects.orientationWidget;
                 default:
                     return objects.widget;
             }
@@ -156,7 +169,7 @@ async function makeRenderer(
     );
     const sceneGraph = makeSceneGraphDouble(actorIds);
     renderer.attachSceneGraph(sceneGraph as unknown as VisorSceneNodeExtended);
-    return { renderer, camera, sceneGraph, ...objects };
+    return { renderer, camera, scene, sceneGraph, ...objects };
 }
 
 /** A sender that records its calls and resolves. */
@@ -336,3 +349,28 @@ describe('WasmRenderer reports the cross-section plane on the end-of-drag event'
         expect(sender).not.toHaveBeenCalled();
     });
 });
+
+describe('WasmRenderer marks an orientation-widget move as a gesture', () => {
+    // As above, the event does not exist under jsdom, so what is pinned is
+    // the *registration*: which event the mark is bound to, that there is
+    // exactly one of it on the orientation widget, and that the callback
+    // marks and sends nothing. Whether the wasm widget invokes that event at
+    // all is MC-I6's subject and no gate reaches it.
+    test('the orientation widget is observed once on EndInteractionEvent and the callback marks a widget gesture', async () => {
+        const sender = makeSender();
+        const { scene, orientationWidget } = await makeRenderer(sender);
+
+        const endCalls = orientationWidget.observe.mock.calls.filter(
+            (call) => call[0] === 'EndInteractionEvent'
+        );
+        expect(endCalls).toHaveLength(1);
+        expect(scene.noteWidgetGesture).not.toHaveBeenCalled();
+
+        await endCalls[0][1]();
+
+        expect(scene.noteWidgetGesture).toHaveBeenCalledTimes(1);
+        // The mark carries no payload and triggers no send: the report stays
+        // the settle's, through the unchanged sync_camera path.
+        expect(sender).not.toHaveBeenCalled();
+    });
+});
diff --git a/src/ansys/visor/visor-client/src/renderer/WasmRenderer.ts b/src/ansys/visor/visor-client/src/renderer/WasmRenderer.ts
index d61fff6d..b18f9054 100644
--- a/src/ansys/visor/visor-client/src/renderer/WasmRenderer.ts
+++ b/src/ansys/visor/visor-client/src/renderer/WasmRenderer.ts
@@ -96,6 +96,22 @@ export class WasmRenderer implements IRenderer {
             });
         });
 
+        /**
+         * Attribute an orientation-widget camera move to the user.
+         *
+         * Clicking a face of the cube moves the camera entirely inside wasm,
+         * with no DOM input `CameraGestureTracker` can see, so without this
+         * mark the move settles as `programmatic` and the server drops it.
+         * `EndInteractionEvent` (not `InteractionEvent`) fires once per
+         * interaction rather than per animation frame. The callback only
+         * marks the gesture; the report itself is still the settle's,
+         * unchanged, via `sync_camera`.
+         */
+        const orientationWidget = vtkScene.getVtkObject(annotation.widgets.orientationWidgetId);
+        orientationWidget.observe('EndInteractionEvent', () => {
+            vtkScene.noteWidgetGesture();
+        });
+
         // Bounding-box ids are stashed for attachSceneGraph, which is the
         // point at which the live sceneGraph (needed by BoundingBoxWidget)
         // becomes available.
diff --git a/src/ansys/visor/visor-client/src/wasm/CameraGestureTracker.js b/src/ansys/visor/visor-client/src/wasm/CameraGestureTracker.js
index 694c2147..b9895371 100644
--- a/src/ansys/visor/visor-client/src/wasm/CameraGestureTracker.js
+++ b/src/ansys/visor/visor-client/src/wasm/CameraGestureTracker.js
@@ -25,6 +25,11 @@
  *   the camera event can arrive before the tracker has noticed the input.
  *   To cover that, a wheel event or a z/r keydown arriving while a report is
  *   pending marks that report `gesture` as well.
+ *
+ * - The orientation widget is not a DOM input at all: its face click reaches
+ *   the camera inside wasm. It is marked explicitly, through
+ *   `noteWidgetGesture`, from the observer `WasmRenderer` registers on the
+ *   widget's `EndInteractionEvent`.
  */
 
 /**
@@ -190,6 +195,22 @@ export default class CameraGestureTracker {
         this.#settleTimer = setTimeout(this.#reportSettled, CAMERA_SETTLE_MS);
     };
 
+    /**
+     * The orientation widget's end-of-interaction mark, called via
+     * `VtkScene.noteWidgetGesture` from the `EndInteractionEvent` observer in
+     * `WasmRenderer`. A face click involves no button, wheel or z/r key, so
+     * without this mark the move settles as `programmatic`.
+     *
+     * Delegates to `#markImpulse` to reuse the same window and retroactive
+     * stickiness as a wheel notch or z/r press, so a mark landing before or
+     * after the camera events it belongs to is still caught.
+     *
+     * @return {void}
+     */
+    noteWidgetGesture = () => {
+        this.#markImpulse();
+    };
+
     /**
      * @return {void}
      */
diff --git a/src/ansys/visor/visor-client/src/wasm/VtkScene.js b/src/ansys/visor/visor-client/src/wasm/VtkScene.js
index 81d71a0e..adce7015 100644
--- a/src/ansys/visor/visor-client/src/wasm/VtkScene.js
+++ b/src/ansys/visor/visor-client/src/wasm/VtkScene.js
@@ -159,6 +159,17 @@ export default class VtkScene {
     addCameraSettledListener = (handler) => {
         return this.#cameraGestureTracker.addSettledListener(handler);
     };
+    /**
+     * Mark the settle window now open as a user gesture, on behalf of a wasm
+     * widget (the orientation widget) whose interaction is not a DOM input
+     * this scene can see. `WasmRenderer` calls this from its
+     * `EndInteractionEvent` observer, since `#cameraGestureTracker` is private.
+     *
+     * @return {void}
+     */
+    noteWidgetGesture = () => {
+        this.#cameraGestureTracker?.noteWidgetGesture();
+    };
     /**
      * @param {(actorId:number,ctrlKey:boolean,shiftKey:boolean,normX:number,normY:number)=>void} handler
      * @return {()=>void}