diff --git a/pytorch3d/renderer/mesh/shader.py b/pytorch3d/renderer/mesh/shader.py
index a919e0ca..71b32c0b 100644
--- a/pytorch3d/renderer/mesh/shader.py
+++ b/pytorch3d/renderer/mesh/shader.py
@@ -324,6 +324,11 @@ class SplatterPhongShader(ShaderBase):
         self.splatter_blender = None
         super().__init__(**kwargs)
 
+    def to(self, device: Device):
+        if self.splatter_blender:
+            self.splatter_blender.to(device)
+        return super().to(device)
+
     def forward(self, fragments: Fragments, meshes: Meshes, **kwargs) -> torch.Tensor:
         cameras = super()._get_cameras(**kwargs)
         texels = meshes.sample_textures(fragments)
@@ -349,7 +354,7 @@ class SplatterPhongShader(ShaderBase):
             pixel_coords_cameras,
             cameras,
             fragments.pix_to_face < 0,
-            self.blend_params,
+            kwargs.get("blend_params", self.blend_params),
         )
 
         return images
@@ -398,6 +403,9 @@ class SoftDepthShader(ShaderBase):
     """
 
     def forward(self, fragments: Fragments, meshes: Meshes, **kwargs) -> torch.Tensor:
+        if fragments.dists is None:
+            raise ValueError("SoftDepthShader requires Fragments.dists to be present.")
+
         cameras = super()._get_cameras(**kwargs)
 
         N, H, W, K = fragments.pix_to_face.shape
diff --git a/pytorch3d/renderer/splatter_blend.py b/pytorch3d/renderer/splatter_blend.py
index 26107663..0149dfb3 100644
--- a/pytorch3d/renderer/splatter_blend.py
+++ b/pytorch3d/renderer/splatter_blend.py
@@ -464,6 +464,12 @@ class SplatterBlender(torch.nn.Module):
             input_shape, device
         )
 
+    def to(self, device):
+        self.offsets = self.offsets.to(device)
+        self.crop_ids_h = self.crop_ids_h.to(device)
+        self.crop_ids_w = self.crop_ids_w.to(device)
+        super().to(device)
+
     def forward(
         self,
         colors: torch.Tensor,
diff --git a/tests/test_shader.py b/tests/test_shader.py
index f4ac8116..396132e1 100644
--- a/tests/test_shader.py
+++ b/tests/test_shader.py
@@ -60,7 +60,7 @@ class TestShader(TestCaseMixin, unittest.TestCase):
                 self.assertIs(cpu_shader, cuda_shader)
                 if cameras is None:
                     self.assertIsNone(cuda_shader.cameras)
-                    with self.assertRaisesRegexp(ValueError, "Cameras must be"):
+                    with self.assertRaisesRegex(ValueError, "Cameras must be"):
                         cuda_shader._get_cameras()
                 else:
                     self.assertEqual(cuda_device, cuda_shader.cameras.device)