diff --git a/README.rst b/README.rst
index 18bb3b7..626e907 100644
--- a/README.rst
+++ b/README.rst
@@ -20,7 +20,7 @@ Installation
     # We need a VTK that has its wasm counterpart
     # This is the first version available with it
     # For ParaView (not yet supported), VTK don't need to be installed
-    pip install "vtk==9.3.20240525.dev0" --extra-index-url https://wheels.vtk.org
+    pip install "vtk==9.3.20240817.dev0" --extra-index-url https://wheels.vtk.org
 
 
 Development
@@ -64,7 +64,7 @@ Running examples
     # We need a VTK that has its wasm counterpart
     # This is the first version available with it
     # For ParaView (not yet supported), VTK don't need to be installed
-    pip install "vtk==9.3.20240418.dev0" --extra-index-url https://wheels.vtk.org
+    pip install "vtk==9.3.20240810.dev0" --extra-index-url https://wheels.vtk.org
 
     # regular trame app
     python ./examples/vtk/cone.py 
@@ -72,3 +72,13 @@ Running examples
 
 Some example are meant to test and validate WASM rendering.
 Some will default for remote rendering but if you want to force them to use WASM just run `export USE_WASM=1` before executing them.
+
+SharedArrayBuffer
+----------------------------------------
+
+To enable SharedArrayBuffer within trame you can run the following.
+
+.. code-block:: console
+
+    export WSLINK_HTTP_HEADERS=./http_headers.json
+    python ./examples/vtk/cone.py
\ No newline at end of file
diff --git a/examples/pv/README.md b/examples/pv/README.md
index 482c065..79d3bfd 100644
--- a/examples/pv/README.md
+++ b/examples/pv/README.md
@@ -1,3 +1,7 @@
+# ParaView support
+
+Not Supported yet but we hope to get it working with 5.14 or nightly after 5.13 release.
+
 ## Setup 
 
 ```
diff --git a/examples/pv/cone.py b/examples/pv/cone.py
index ab5b56b..06e930f 100644
--- a/examples/pv/cone.py
+++ b/examples/pv/cone.py
@@ -16,6 +16,10 @@
 class DemoApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type=CLIENT_TYPE)
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.cone = simple.Cone()
         self.representation = simple.Show()
         self.view = simple.Render()
diff --git a/examples/pyvista/basic.py b/examples/pyvista/basic.py
index 5dea363..df93b29 100644
--- a/examples/pyvista/basic.py
+++ b/examples/pyvista/basic.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import pyvista as pv
 from pyvista import examples
 
@@ -7,7 +7,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -32,6 +32,10 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window, self.widgets = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/pyvista/bg_image.py b/examples/pyvista/bg_image.py
index 3de9f46..2f1c963 100644
--- a/examples/pyvista/bg_image.py
+++ b/examples/pyvista/bg_image.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import pyvista as pv
 from pyvista import examples
 
@@ -7,7 +7,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -17,9 +17,10 @@ def setup_pyvista():
     p.add_mesh(examples.load_airplane(), smooth_shading=True)
     p.add_background_image(examples.mapfile)
     p.reset_camera()
-    # p.show_axes() # FIXME
+    p.show_axes()
+    widgets = [r.axes_widget for r in p.renderers if hasattr(r, "axes_widget")]
 
-    return p.ren_win
+    return p.ren_win, widgets
 
 
 # -----------------------------------------------------------------------------
@@ -28,7 +29,11 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
-        self.render_window = setup_pyvista()
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
+        self.render_window, self.widgets = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
 
@@ -40,6 +45,8 @@ def _ui(self):
             ):
                 if WASM:
                     self.html_view = vtklocal.LocalView(self.render_window)
+                    for w in self.widgets:
+                        self.html_view.register_widget(w)
                 else:
                     self.html_view = vtk_widgets.VtkRemoteView(
                         self.render_window, interactive_ratio=1
diff --git a/examples/pyvista/drap2dsurf.py b/examples/pyvista/drap2dsurf.py
index 8a04723..3d01aca 100644
--- a/examples/pyvista/drap2dsurf.py
+++ b/examples/pyvista/drap2dsurf.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import numpy as np
 import pyvista as pv
 from pyvista import examples
@@ -8,7 +8,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -34,9 +34,10 @@ def setup_pyvista():
     p.add_mesh(grid, cmap="seismic", clim=[-1, 1])
     p.add_mesh(pv.PolyData(path), color="orange")
     p.reset_camera()
-    # p.show_axes() # FIXME
+    p.show_axes()
+    widgets = [r.axes_widget for r in p.renderers if hasattr(r, "axes_widget")]
 
-    return p.ren_win
+    return p.ren_win, widgets
 
 
 # -----------------------------------------------------------------------------
@@ -45,7 +46,11 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
-        self.render_window = setup_pyvista()
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
+        self.render_window, self.widgets = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
 
@@ -57,6 +62,8 @@ def _ui(self):
             ):
                 if WASM:
                     self.html_view = vtklocal.LocalView(self.render_window)
+                    for w in self.widgets:
+                        self.html_view.register_widget(w)
                 else:
                     self.html_view = vtk_widgets.VtkRemoteView(
                         self.render_window, interactive_ratio=1
diff --git a/examples/pyvista/eye_dome_lighting.py b/examples/pyvista/eye_dome_lighting.py
index d6bd9dd..386d656 100644
--- a/examples/pyvista/eye_dome_lighting.py
+++ b/examples/pyvista/eye_dome_lighting.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import pyvista as pv
 from pyvista import examples
 
@@ -7,7 +7,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -20,8 +20,9 @@ def setup_pyvista():
     p.enable_eye_dome_lighting()
     p.reset_camera()
     p.show_axes()
+    widgets = [r.axes_widget for r in p.renderers if hasattr(r, "axes_widget")]
 
-    return p.ren_win
+    return p.ren_win, widgets
 
 
 # -----------------------------------------------------------------------------
@@ -30,7 +31,11 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
-        self.render_window = setup_pyvista()
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
+        self.render_window, self.widgets = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
 
@@ -42,6 +47,8 @@ def _ui(self):
             ):
                 if WASM:
                     self.html_view = vtklocal.LocalView(self.render_window)
+                    for w in self.widgets:
+                        self.html_view.register_widget(w)
                 else:
                     self.html_view = vtk_widgets.VtkRemoteView(
                         self.render_window, interactive_ratio=1
diff --git a/examples/pyvista/glyph.py b/examples/pyvista/glyph.py
index 34abea5..084c699 100644
--- a/examples/pyvista/glyph.py
+++ b/examples/pyvista/glyph.py
@@ -32,6 +32,10 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/pyvista/isolines.py b/examples/pyvista/isolines.py
index 50b0f2f..e06157b 100644
--- a/examples/pyvista/isolines.py
+++ b/examples/pyvista/isolines.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import pyvista as pv
 from pyvista import examples
 
@@ -7,7 +7,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -31,6 +31,10 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/pyvista/labels.py b/examples/pyvista/labels.py
index 64a6c97..ffcd3d5 100644
--- a/examples/pyvista/labels.py
+++ b/examples/pyvista/labels.py
@@ -1,4 +1,3 @@
-import os
 import numpy as np
 import pyvista as pv
 
@@ -7,7 +6,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -40,7 +39,7 @@ def get_point_along_spline(distance):
 
     p = pv.Plotter()
     p.add_mesh(spline, scalars="arc_length", render_lines_as_tubes=True, line_width=10)
-    p.add_point_labels(
+    labels = p.add_point_labels(
         label_points,
         labels,
         always_visible=True,
@@ -61,9 +60,19 @@ def get_point_along_spline(distance):
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
+        self.server.state.change("scale")(self.update_scale)
+
+    def update_scale(self, scale, **_):
+        print(scale)
+        # self.text.SetTextScaleModeToViewport()
+        # self.html_view.update()
 
     def _ui(self):
         with DivLayout(self.server) as layout:
@@ -77,6 +86,14 @@ def _ui(self):
                     self.html_view = vtk_widgets.VtkRemoteView(
                         self.render_window, interactive_ratio=1
                     )
+                html.Input(
+                    type="range",
+                    min=0.5,
+                    max=4,
+                    step=0.1,
+                    v_model=("scale", 1),
+                    style="position: absolute; top: 10px; left: 10px; z-index: 100; width: calc(100vw - 20px);",
+                )
 
         return layout
 
diff --git a/examples/pyvista/linked_view.py b/examples/pyvista/linked_view.py
index b20435d..da53d82 100644
--- a/examples/pyvista/linked_view.py
+++ b/examples/pyvista/linked_view.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import pyvista as pv
 from pyvista import examples
 
@@ -7,7 +7,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -25,9 +25,10 @@ def setup_pyvista():
     p.add_mesh(decimated, color=True, show_edges=True)
     p.link_views()  # link all the views
     p.reset_camera()
-    # p.show_axes() # FIXME
+    p.show_axes()
+    widgets = [r.axes_widget for r in p.renderers if hasattr(r, "axes_widget")]
 
-    return p.ren_win
+    return p.ren_win, widgets
 
 
 # -----------------------------------------------------------------------------
@@ -36,7 +37,11 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
-        self.render_window = setup_pyvista()
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
+        self.render_window, self.widgets = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
 
@@ -48,6 +53,8 @@ def _ui(self):
             ):
                 if WASM:
                     self.html_view = vtklocal.LocalView(self.render_window)
+                    for w in self.widgets:
+                        self.html_view.register_widget(w)
                 else:
                     self.html_view = vtk_widgets.VtkRemoteView(
                         self.render_window, interactive_ratio=1
diff --git a/examples/pyvista/pbr.py b/examples/pyvista/pbr.py
index a0b0172..2172412 100644
--- a/examples/pyvista/pbr.py
+++ b/examples/pyvista/pbr.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import pyvista as pv
 from pyvista import examples
 
@@ -7,7 +7,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -33,6 +33,10 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/pyvista/requirements.txt b/examples/pyvista/requirements.txt
index 8c0e590..1d48100 100644
--- a/examples/pyvista/requirements.txt
+++ b/examples/pyvista/requirements.txt
@@ -1,2 +1,3 @@
 pyvista
 trame-vtk
+trame-server>=3.1.0
diff --git a/examples/pyvista/spline.py b/examples/pyvista/spline.py
index b11db6d..dd8e6f1 100644
--- a/examples/pyvista/spline.py
+++ b/examples/pyvista/spline.py
@@ -41,6 +41,10 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/pyvista/texture.py b/examples/pyvista/texture.py
index eef952a..9056ce7 100644
--- a/examples/pyvista/texture.py
+++ b/examples/pyvista/texture.py
@@ -1,4 +1,4 @@
-import os
+# import os
 import pyvista as pv
 from pyvista import examples
 
@@ -7,7 +7,7 @@
 from trame.widgets import html, client, vtk as vtk_widgets
 from trame_vtklocal.widgets import vtklocal
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 # -----------------------------------------------------------------------------
 
@@ -37,6 +37,10 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/pyvista/widget.py b/examples/pyvista/widget.py
index 72119b0..f280b08 100644
--- a/examples/pyvista/widget.py
+++ b/examples/pyvista/widget.py
@@ -27,6 +27,10 @@ def setup_pyvista():
 class TrameApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_pyvista()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/vtk/axes_actor.py b/examples/vtk/axes_actor.py
index f771432..d432146 100644
--- a/examples/vtk/axes_actor.py
+++ b/examples/vtk/axes_actor.py
@@ -51,6 +51,10 @@ def setup_vtk():
 class App:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = setup_vtk()
         self.ui = self._build_ui()
 
diff --git a/examples/vtk/charts_scatter.py b/examples/vtk/charts_scatter.py
index 0172b70..1c5ada2 100644
--- a/examples/vtk/charts_scatter.py
+++ b/examples/vtk/charts_scatter.py
@@ -1,5 +1,5 @@
-import math
 import os
+import math
 from vtkmodules.vtkChartsCore import vtkChart, vtkChartXY, vtkPlotPoints
 from vtkmodules.vtkCommonColor import vtkNamedColors
 from vtkmodules.vtkCommonCore import vtkFloatArray
@@ -87,6 +87,10 @@ def create_vtk_pipeline():
 class App:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = create_vtk_pipeline()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/vtk/cone.py b/examples/vtk/cone.py
index c187892..ea177ea 100644
--- a/examples/vtk/cone.py
+++ b/examples/vtk/cone.py
@@ -57,6 +57,10 @@ def create_vtk_pipeline():
 class DemoApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type=CLIENT_TYPE)
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window, self.cone = create_vtk_pipeline()
         self.server.state.update(dict(mem_blob=0, mem_vtk=0))
         self.html_view = None
diff --git a/examples/vtk/flow.py b/examples/vtk/flow.py
index 9466b2e..c1f17ad 100644
--- a/examples/vtk/flow.py
+++ b/examples/vtk/flow.py
@@ -136,6 +136,10 @@ def create_vtk_pipeline():
 class DemoApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type=CLIENT_TYPE)
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window = create_vtk_pipeline()
         self.html_view = None
         self.ui = self._ui()
diff --git a/examples/vtk/glyph.py b/examples/vtk/glyph.py
index f103525..6cfa76d 100644
--- a/examples/vtk/glyph.py
+++ b/examples/vtk/glyph.py
@@ -22,6 +22,8 @@
 import vtkmodules.vtkRenderingOpenGL2  # noqa
 from vtkmodules.vtkInteractionStyle import vtkInteractorStyleSwitch  # noqa
 
+import json
+
 
 def setup_vtk():
     colors = vtkNamedColors()
@@ -117,11 +119,17 @@ def setup_vtk():
 class App:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window, self.renderer, self.cone, self.sphere = setup_vtk()
         self.view_local = None
         self.view_remote = None
         self.ui = self._build_ui()
 
+        self.server.state.camera = None
+
     @property
     def ctrl(self):
         return self.server.controller
@@ -133,11 +141,23 @@ def on_resolution_change(self, resolution, **kwargs):
         self.view_remote.update()
         self.view_local.update()
 
+    @change("camera")
+    def on_camera_change(self, camera, **kwargs):
+        if camera is not None:
+            self.view_local.object_manager.UpdateObjectFromState(json.dumps(camera))
+            self.view_remote.update()
+
     def reset_camera(self):
         self.renderer.ResetCamera()
         self.view_local.update()
         self.view_remote.update()
 
+    def update_client(self, reset_camera=False):
+        if reset_camera:
+            self.renderer.ResetCamera()
+            self.ctrl.rview_reset_camera()
+        self.ctrl.view_update(push_camera=True)
+
     def _build_ui(self):
         with SinglePageLayout(self.server) as layout:
             layout.icon.click = self.reset_camera
@@ -151,7 +171,12 @@ def _build_ui(self):
                     dense=True,
                     hide_details=True,
                 )
-                vuetify.VBtn("Update", click=self.ctrl.view_update)
+                vuetify.VBtn("S => C", click=self.update_client)
+                vuetify.VBtn(icon="mdi-crop-free", click=self.ctrl.view_reset_camera)
+                vuetify.VBtn(
+                    icon="mdi-panorama-variant-outline",
+                    click=(self.update_client, "[true]"),
+                )
 
             with layout.content:
                 with vuetify.VContainer(
@@ -164,14 +189,17 @@ def _build_ui(self):
                         self.view_local = vtklocal.LocalView(
                             self.render_window,
                             eager_sync=True,
+                            camera="camera = $event",
                         )
                         self.ctrl.view_update = self.view_local.update
+                        self.ctrl.view_reset_camera = self.view_local.reset_camera
                     with vuetify.VContainer(
                         fluid=True, classes="pa-0 fill-height", style="width: 50%;"
                     ):
                         self.view_remote = VtkRemoteView(
                             self.render_window, interactive_ratio=1
                         )
+                        self.ctrl.rview_reset_camera = self.view_remote.reset_camera
 
             # hide footer
             layout.footer.hide()
diff --git a/examples/vtk/requirements.txt b/examples/vtk/requirements.txt
index 39c2cef..f55dd6a 100644
--- a/examples/vtk/requirements.txt
+++ b/examples/vtk/requirements.txt
@@ -1,2 +1,3 @@
 trame-vuetify
 trame-vtk
+trame-server>=3.1
diff --git a/examples/vtk/silhouette.py b/examples/vtk/silhouette.py
index 2f1cc69..c00d31c 100644
--- a/examples/vtk/silhouette.py
+++ b/examples/vtk/silhouette.py
@@ -56,6 +56,10 @@ def setup_vtk():
 class SilhouetteApp:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window, self.cone_source = setup_vtk()
         self.ui = self._build_ui()
 
@@ -105,6 +109,7 @@ def _build_ui(self):
                     with vuetify3.VCol(classes="pa-0 fill-height"):
                         view = vtklocal.LocalView(
                             self.render_window,
+                            eager_sync=True,
                         )
                         self.ctrl.view_update = view.update
                         self.ctrl.view_reset_camera = view.reset_camera
diff --git a/examples/vtk/volume.py b/examples/vtk/volume.py
index 326e782..a8978ff 100644
--- a/examples/vtk/volume.py
+++ b/examples/vtk/volume.py
@@ -78,6 +78,10 @@ def setup_vtk():
 class App:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.local_view = None
         self.render_window = setup_vtk()
         self.ui = self._build_ui()
diff --git a/examples/vtk/widgets_box.py b/examples/vtk/widgets_box.py
index 9024ea0..c299fc7 100644
--- a/examples/vtk/widgets_box.py
+++ b/examples/vtk/widgets_box.py
@@ -78,6 +78,10 @@ def create_vtk_pipeline():
 class App:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.render_window, self.widget = create_vtk_pipeline()
         self.html_view = None
         self.ui = self._ui()
@@ -90,6 +94,7 @@ def _ui(self):
             ):
                 if WASM:
                     self.html_view = vtklocal.LocalView(self.render_window)
+                    self.html_view.register_widget(self.widget)
                 else:
                     self.html_view = vtk_widgets.VtkRemoteView(self.render_window)
 
diff --git a/examples/vtk/widgets_camera.py b/examples/vtk/widgets_camera.py
index 49dfaa4..236faff 100644
--- a/examples/vtk/widgets_camera.py
+++ b/examples/vtk/widgets_camera.py
@@ -1,4 +1,4 @@
-import os
+# import os
 from pathlib import Path
 
 from trame.app import get_server
@@ -22,7 +22,7 @@
     vtkRenderer,
 )
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 
 def create_vtk_pipeline(path):
@@ -75,6 +75,10 @@ def create_vtk_pipeline(path):
 class App:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.server.cli.add_argument("--data")
         args, _ = self.server.cli.parse_known_args()
         self.render_window = create_vtk_pipeline(args.data)
diff --git a/examples/vtk/widgets_plane.py b/examples/vtk/widgets_plane.py
index fd81b4f..d30a58d 100644
--- a/examples/vtk/widgets_plane.py
+++ b/examples/vtk/widgets_plane.py
@@ -1,4 +1,4 @@
-import os
+# import os
 from pathlib import Path
 
 from trame.app import get_server
@@ -29,7 +29,7 @@
     vtkRenderer,
 )
 
-WASM = "USE_WASM" in os.environ
+WASM = True  # "USE_WASM" in os.environ
 
 
 def create_vtk_pipeline(file_to_load):
@@ -132,6 +132,10 @@ def __call__(self, caller, ev):
 class App:
     def __init__(self, server=None):
         self.server = get_server(server, client_type="vue3")
+
+        # enable shared array buffer
+        self.server.http_headers.shared_array_buffer = True
+
         self.server.cli.add_argument("--data")
         args, _ = self.server.cli.parse_known_args()
         self.render_window, self.widget = create_vtk_pipeline(args.data)
diff --git a/http_headers.json b/http_headers.json
new file mode 100644
index 0000000..9b8c0ca
--- /dev/null
+++ b/http_headers.json
@@ -0,0 +1,6 @@
+{
+    "Cross-Origin-Opener-Policy": "same-origin",
+    "Cross-Origin-Embedder-Policy": "require-corp",
+    "Access-Control-Allow-Origin": "*",
+    "Cache-Control": "no-store"
+}
\ No newline at end of file
diff --git a/trame_vtklocal/module/__init__.py b/trame_vtklocal/module/__init__.py
index 4544c27..62190b5 100644
--- a/trame_vtklocal/module/__init__.py
+++ b/trame_vtklocal/module/__init__.py
@@ -30,4 +30,6 @@ def get_helper(server):
 def setup(trame_server, **kwargs):
     global HELPERS_PER_SERVER
     HELPERS_PER_SERVER[trame_server.name] = ObjectManagerHelper(trame_server)
-    trame_server.enable_module(register_wasm(serve_path))
+    trame_server.enable_module(
+        register_wasm(serve_path, trame_server.http_headers.shared_array_buffer)
+    )
diff --git a/trame_vtklocal/module/protocol.py b/trame_vtklocal/module/protocol.py
index f16602e..3c2f227 100644
--- a/trame_vtklocal/module/protocol.py
+++ b/trame_vtklocal/module/protocol.py
@@ -1,3 +1,4 @@
+# import json
 from wslink import register as export_rpc
 from wslink.websocket import LinkProtocol
 
@@ -15,13 +16,34 @@ def __init__(self, *args, **kwargs):
         self.vtk_object_manager = vtkObjectManager()
         self.vtk_object_manager.Initialize()
         self._subscriptions = {}
+        self._widgets = {}
         self._last_publish_states = {}
         self._last_publish_hash = set()
+        self._push_camera = False
 
         self._debug_state = False
         self._debug_state_counter = 1
 
-    def update(self):
+    def register_widget(self, root_obj, dep_obj):
+        self.vtk_object_manager.RegisterObject(dep_obj)
+        root_id = self.vtk_object_manager.GetId(root_obj)
+        dep_id = self.vtk_object_manager.GetId(dep_obj)
+        if root_id not in self._widgets:
+            self._widgets[root_id] = set()
+
+        self._widgets[root_id].add(dep_id)
+        print(f"Register widget: {dep_obj.GetClassName()}={dep_id}")
+
+    def unregister_widget(self, root_obj, dep_obj):
+        self.vtk_object_manager.UnRegisterObject(dep_obj)
+        root_id = self.vtk_object_manager.GetId(root_obj)
+        dep_id = self.vtk_object_manager.GetId(dep_obj)
+        if root_id in self._widgets:
+            self._widgets[root_id].discard(dep_id)
+
+    def update(self, push_camera=False, **_):
+        self._push_camera = push_camera
+
         self.vtk_object_manager.UpdateStatesFromObjects()
         if self._debug_state:
             self.vtk_object_manager.Export(f"snapshot-{self._debug_state_counter}")
@@ -72,10 +94,26 @@ def update_subscription(self, obj_id, delta):
             self._last_publish_states.clear()
             self._last_publish_hash.clear()
 
+        # Keep track of widgets as well
+        if obj_id in self._widgets:
+            for w_id in self._widgets[obj_id]:
+                self.update_subscription(w_id, delta)
+
     @export_rpc("vtklocal.get.state")
     def get_state(self, obj_id):
-        # print(f"get_state {obj_id} {self.vtk_object_manager.GetObjectAtId(obj_id).GetClassName()}")
         state = self.vtk_object_manager.GetState(obj_id)
+
+        # -------------------------------------------------
+        # DEBUG - Helper for dynamic state patching
+        # -------------------------------------------------
+        # state = json.loads(state)
+        # if state["ClassName"] == "vtkTextProperty":
+        #     state["FontSize"] *= 2
+        # elif state["ClassName"] == "vtkCubeAxesActor":
+        #     state["ScreenSize"] *= 2
+        # state = json.dumps(state)
+        # -------------------------------------------------
+
         return state
 
     @export_rpc("vtklocal.get.hash")
@@ -87,16 +125,37 @@ def get_hash(self, hash):
     def get_status(self, obj_id):
         # print("get_status", obj_id)
         ids = self.vtk_object_manager.GetAllDependencies(obj_id)
+
+        # Add widgets ids without duplicate
+        ids_width_deps = list(ids)
+        if obj_id in self._widgets:
+            for dep_id in self._widgets[obj_id]:
+                ids_width_deps += list(
+                    self.vtk_object_manager.GetAllDependencies(dep_id)
+                )
+        ids = list(set(ids_width_deps))
+
         hashes = self.vtk_object_manager.GetBlobHashes(ids)
         renderWindow = self.vtk_object_manager.GetObjectAtId(obj_id)
         ids_mtime = [map_id_mtime(self.vtk_object_manager, v) for v in ids]
         ignore_ids = []
+        cameras = []
         if renderWindow:
+            interactor = self.vtk_object_manager.GetId(renderWindow.interactor)
             renderers = renderWindow.GetRenderers()
             for renderer in renderers:
                 activeCamera = renderer.GetActiveCamera()
-                ignore_ids.append(self.vtk_object_manager.GetId(activeCamera))
-        return dict(ids=ids_mtime, hashes=hashes, ignore_ids=ignore_ids)
+                cid = self.vtk_object_manager.GetId(activeCamera)
+                if not self._push_camera:
+                    ignore_ids.append(cid)
+                cameras.append(cid)
+        return dict(
+            ids=ids_mtime,
+            hashes=hashes,
+            ignore_ids=ignore_ids,
+            cameras=cameras,
+            interactor=interactor,
+        )
 
 
 class ObjectManagerHelper:
diff --git a/trame_vtklocal/module/wasm.py b/trame_vtklocal/module/wasm.py
index b60909a..b625e58 100644
--- a/trame_vtklocal/module/wasm.py
+++ b/trame_vtklocal/module/wasm.py
@@ -54,24 +54,26 @@ async def setup_wasm_directory(target_directory, wasm_url):
     with tarfile.open(dest_file) as tgz:
         tgz.extractall(dest_folder)
 
-    print(f"Downloaded WASM in {dest_folder}")
+    print(f"Downloaded WASM:\n - from: {wasm_url}\n - to: {dest_folder}")
     Path(dest_file).unlink()
 
 
-def get_wasm_info():
+def get_wasm_info(use_thread=False):
     from vtkmodules.vtkCommonCore import vtkVersion
 
     vtk_version = vtkVersion()
-    version = vtk_version.GetVTKVersion()
     wasm_bits = "wasm32"
-    return (
-        version,
-        f"https://gitlab.kitware.com/api/v4/projects/13/packages/generic/vtk-{wasm_bits}-emscripten/{version}/vtk-{version}-{wasm_bits}-emscripten.tar.gz",
-    )
+    version = vtk_version.GetVTKVersion()
+    url_addon = "-threads" if use_thread else ""
+    url = f"https://gitlab.kitware.com/api/v4/projects/13/packages/generic/vtk-{wasm_bits}-emscripten{url_addon}/{version}/vtk-{version}-{wasm_bits}-emscripten{url_addon}.tar.gz"
+    if use_thread:
+        version += "-threads"
+
+    return version, url
 
 
-def register_wasm(serve_path):
-    version, wasm_url = get_wasm_info()
+def register_wasm(serve_path, use_thread=False):
+    version, wasm_url = get_wasm_info(use_thread)
     BASE_URL = f"__trame_vtklocal/wasm/{version}"
     dest_directory = Path(serve_path) / "wasm" / version
 
diff --git a/trame_vtklocal/widgets/vtklocal.py b/trame_vtklocal/widgets/vtklocal.py
index 053f530..b3e449e 100644
--- a/trame_vtklocal/widgets/vtklocal.py
+++ b/trame_vtklocal/widgets/vtklocal.py
@@ -75,6 +75,7 @@ def __init__(self, render_window, **kwargs):
             "updated",
             ("memory_vtk", "memory-vtk"),
             ("memory_arrays", "memory-arrays"),
+            ("camera", "camera"),
         ]
 
     @property
@@ -85,18 +86,19 @@ def api(self):
     def object_manager(self):
         return self.api.vtk_object_manager
 
-    def update(self):
-        self.api.update()
+    def update(self, push_camera=False):
+        self.api.update(push_camera=push_camera)
         self.server.js_call(self.__ref, "update")
 
     def register_widget(self, w):
         if w not in self.__registered_obj:
+            self.api.register_widget(self._render_window, w)
             self.__registered_obj.append(w)
-            self.object_manager.RegisterObject(w)
+            self.api.update()
 
     def uregister_widgets(self):
         for w in self.__registered_obj:
-            self.object_manager.UnRegisterObject(w)
+            self.api.unregister(self._render_window, w)
 
         self.__registered_obj.clear()
 
diff --git a/vue-components/src/components/VtkLocal.js b/vue-components/src/components/VtkLocal.js
index 90a21f9..f2f6f83 100644
--- a/vue-components/src/components/VtkLocal.js
+++ b/vue-components/src/components/VtkLocal.js
@@ -2,7 +2,7 @@ import { inject, ref, unref, onMounted, onBeforeUnmount } from "vue";
 import { createModule } from "../utils";
 
 export default {
-  emits: ["updated", "memory-vtk", "memory-arrays"],
+  emits: ["updated", "memory-vtk", "memory-arrays", "camera"],
   props: {
     renderWindow: {
       type: Number,
@@ -22,6 +22,8 @@ export default {
   setup(props, { emit }) {
     const trame = inject("trame");
     const wasmURL = trame.state.get("__trame_vtklocal_wasm_url");
+    const cameraIds = [];
+    const observerTags = [];
     const container = ref(null);
     const canvas = ref(null);
     const client = props.wsClient || trame?.client;
@@ -192,6 +194,11 @@ export default {
             // console.log("skip", vtkId);
           }
         });
+
+        // For listeners
+        cameraIds.push(...serverStatus.cameras);
+        // interactorId = serverStatus.interactor;
+
         serverStatus.ignore_ids.forEach((vtkId) => {
           sceneManager.unRegisterState(vtkId);
         });
@@ -244,11 +251,20 @@ export default {
         subscribe();
       }
       await update();
-      // sceneManager.addObserver(props.renderWindow, "StartEvent", (id, eventName) => {
-      //   eventName = sceneManager.UTF8ToString(eventName);
-      //   console.log(`${eventName} emitted from ${id}`);
-      // });
-      // sceneManager.addObserver(props.renderWindow, "EndEvent", () => { console.log("vtkRenderWindow EndEvent"); });
+
+      // Camera listener
+      for (let i = 0; i < cameraIds.length; i++) {
+        const cid = cameraIds[i];
+        observerTags.push([
+          cid,
+          sceneManager.addObserver(cid, "ModifiedEvent", () => {
+            sceneManager.updateStateFromObject(cid);
+            const cameraState = sceneManager.getState(cid);
+            emit("camera", cameraState);
+          }),
+        ]);
+      }
+
       sceneManager.startEventLoop(props.renderWindow);
       if (resizeObserver) {
         resizeObserver.observe(unref(container));
@@ -259,6 +275,13 @@ export default {
       if (subscription) {
         unsubscribe();
       }
+
+      // Camera listeners
+      while (observerTags.length) {
+        const [cid, tag] = observerTags.pop();
+        sceneManager.removeObserver(cid, tag);
+      }
+
       // console.log("vtkLocal::unmounted");
       sceneManager.stopEventLoop(props.renderWindow);
       if (resizeObserver) {