diff --git a/src/viser/_scene_api.py b/src/viser/_scene_api.py
index f3b992b3..599f1cae 100644
--- a/src/viser/_scene_api.py
+++ b/src/viser/_scene_api.py
@@ -259,7 +259,6 @@ def add_light_directional(
         self,
         name: str,
         color: int = 0xFFFFFF,
-        cast_shadow: bool = False,
         intensity: float = 1.0,
         wxyz: tuple[float, float, float, float] | onp.ndarray = (1.0, 0.0, 0.0, 0.0),
         position: tuple[float, float, float] = (0.0, 0.0, 0.0),
@@ -272,9 +271,6 @@ def add_light_directional(
             name: A scene tree name. Names in the format of /parent/child can be used to
                 define a kinematic tree.
             color: hexadecimal color of the light. Default is 0xffffff (white).
-            cast_shadow: If set to true light will cast dynamic shadows.
-                Warning: This is expensive and requires tweaking to get shadows looking right.
-                The default is false.
             intensity: numeric value of the light's strength/intensity. Default is 1.
             wxyz: Quaternion rotation to parent frame from local frame (R_pl).
             position: Translation to parent frame from local frame (t_pl).
@@ -286,7 +282,7 @@ def add_light_directional(
 
         self._websock_interface.queue_message(
             _messages.DirectionalLightMessage(
-                name, position, intensity, color, cast_shadow
+                name, position, intensity, color, 
             )
         )
         return LightHandle._make(self, name, wxyz, position, visible)
@@ -301,8 +297,7 @@ def add_light_ambient(
         visible: bool = True,
     ) -> LightHandle:
         """
-        Add an ambient light to the scene. This light cannot be used to cast shadows as
-        it does not have a direction.
+        Add an ambient light to the scene.
 
         Args:
             name: A scene tree name. Names in the format of /parent/child can be used to
@@ -362,7 +357,6 @@ def add_light_point(
         self,
         name: str,
         color: int = 0xFFFFFF,
-        cast_shadow: bool = False,
         intensity: float = 1.0,
         distance: float = 0.0,
         decay: float = 2.0,
@@ -378,9 +372,6 @@ def add_light_point(
             name: A scene tree name. Names in the format of /parent/child can be used to
                 define a kinematic tree.
             color: hexadecimal color of the light. Default is 0xffffff (white).
-            cast_shadow: If set to true light will cast dynamic shadows.
-                Warning: This is expensive and requires tweaking to get shadows looking right.
-                The default is false.
             intensity: numeric value of the light's strength/intensity. Default is 1.
             distance: When distance is zero, light will attenuate according to inverse-square law
                 to infinite distance. When distance is non-zero, light will attenuate according to
@@ -400,7 +391,7 @@ def add_light_point(
 
         self._websock_interface.queue_message(
             _messages.PointLightMessage(
-                name, position, intensity, color, cast_shadow, distance, decay, power
+                name, position, intensity, color, distance, decay, power
             )
         )
         return LightHandle._make(self, name, wxyz, position, visible)
@@ -452,7 +443,6 @@ def add_light_spot(
         angle: float = onp.pi / 3,
         penumbra: float = 0.0,
         decay: float = 2.0,
-        cast_shadow: bool = False,
         intensity: float = 1.0,
         wxyz: tuple[float, float, float, float] | onp.ndarray = (1.0, 0.0, 0.0, 0.0),
         position: tuple[float, float, float] = (0.0, 0.0, 0.0),
@@ -475,9 +465,6 @@ def add_light_spot(
                 Takes values between zero and 1.
             decay: The amount the light dims along the distance of the light. Default is 2.
                 In context of physically-correct rendering the default value should not be changed.
-            cast_shadow: If set to true light will cast dynamic shadows.
-                Warning: This is expensive and requires tweaking to get shadows looking right.
-                The default is false.
             intensity: numeric value of the light's strength/intensity. Default is 1.
             wxyz: Quaternion rotation to parent frame from local frame (R_pl).
             position: Translation to parent frame from local frame (t_pl).
@@ -497,7 +484,6 @@ def add_light_spot(
                 angle,
                 penumbra,
                 decay,
-                cast_shadow,
             )
         )
         return LightHandle._make(self, name, wxyz, position, visible)