回放叠加改用展开底图，并统一 2D/3D 投递。

箭头/采集图像与 live 的 processed_frame 对齐；deliver_measurement 先画 2D 再提交同一包给 3D。已用 overlay、scene3d 与 replay 相关测试验证。

apps/studio/tests/test_replay_analysis.py

@@ -465,6 +465,32 @@ class _Host:
         self.frames.append(frame)
 
     def show_analysis_packet(self, packet) -> None:
+        self.deliver_measurement(packet, advance="flush", paint_2d=False)
+
+    def deliver_measurement(
+        self,
+        packet,
+        *,
+        advance: str = "tick",
+        arrow_policy=None,
+        image_source: str | None = None,
+        paint_2d: bool = True,
+    ) -> None:
+        if paint_2d:
+            from orisys_app_shared.acquisition.image_backend import ImageFrame
+
+            self.frames.append(
+                ImageFrame(
+                    getattr(packet, "processed_frame", None),
+                    flow=getattr(packet, "flow", None),
+                    depth=getattr(packet, "depth", None),
+                    valid_mask=getattr(packet, "valid_mask", None),
+                    source=image_source or "replay",
+                    frame_id=int(getattr(packet, "frame_id", 0) or 0),
+                    arrow_policy=arrow_policy,
+                    result_available=True,
+                )
+            )
         self.analysis_packets.append(packet)
 
     def drop_render_marker(self) -> None:

apps/studio/tests/test_replay_controller.py

@@ -262,6 +262,32 @@ class _Host:
         self.frames.append(frame)
 
     def show_analysis_packet(self, packet) -> None:
+        self.deliver_measurement(packet, advance="flush", paint_2d=False)
+
+    def deliver_measurement(
+        self,
+        packet,
+        *,
+        advance: str = "tick",
+        arrow_policy=None,
+        image_source: str | None = None,
+        paint_2d: bool = True,
+    ) -> None:
+        if paint_2d:
+            from orisys_app_shared.acquisition.image_backend import ImageFrame
+
+            self.frames.append(
+                ImageFrame(
+                    getattr(packet, "processed_frame", None),
+                    flow=getattr(packet, "flow", None),
+                    depth=getattr(packet, "depth", None),
+                    valid_mask=getattr(packet, "valid_mask", None),
+                    source=image_source or "replay",
+                    frame_id=int(getattr(packet, "frame_id", 0) or 0),
+                    arrow_policy=arrow_policy,
+                    result_available=True,
+                )
+            )
         self.analysis_packets.append(packet)
 
     def drop_render_marker(self) -> None:

apps/studio/tests/test_scene3d_view.py

@@ -388,8 +388,8 @@ def _run_session(make_window, record_root, *, with_3d: bool):
     if with_3d:
         view = _RecordingView()
         window.mesh3d_panel.attach_view(view)
-    # With no pane the sink still runs (it is registered on the worker) and does
-    # nothing, which is the case the comparison below is about.
+    # 3D is submitted on the GUI deliver path (same tick as 2D), not as an
+    # acquisition-thread sink — with or without a pane attached.
     window.toolbar.btn_record.setChecked(True)
     for index in range(96):
         stuck.emit(ui_check._fake_packet(index, mono_t=index / 30.0))
@@ -427,20 +427,20 @@ def test_the_3d_consumer_cannot_change_the_record(make_window, next_record_root)
     assert "t_rel_s" in header and len(with_3d_csv.splitlines()) > 10
 
 
-def test_the_3d_sink_is_registered_and_inert_when_the_pane_is_off(make_window, next_record_root):
-    """A sink that has to be added and removed around a toggle is a state machine."""
+def test_live_3d_is_not_an_acquisition_thread_sink(make_window, next_record_root):
+    """3D shares the GUI deliver path with 2D; only the record channel is a sink."""
     import orisys_studio.app_window as app_module
 
     window, stuck = _running_window(make_window)
     app_module.recordings_dir = lambda: next_record_root()
     try:
-        assert window._on_packet_recorded in stuck.sinks()
-        assert window._on_packet_for_3d in stuck.sinks(), (
-            "the 3D sink must be registered with the worker, not attached per toggle"
+        assert stuck.sinks() == (window._on_packet_recorded,), (
+            "live 3D must not register a second acquisition-thread sink"
         )
         assert window.mesh3d_panel.view is None, "a box sensor must not build a view"
         for index in range(10):
             stuck.emit(ui_check._fake_packet(index))
+            window._on_run_tick()
         assert window.session_store.count == 10
         assert window.mesh3d_panel.view is None
     finally: