diff --git a/kiui/gridencoder/src/gridencoder.cu b/kiui/gridencoder/src/gridencoder.cu
index b4ac779..cf28c34 100644
--- a/kiui/gridencoder/src/gridencoder.cu
+++ b/kiui/gridencoder/src/gridencoder.cu
@@ -394,7 +394,7 @@ void grid_encode_forward_cuda(const float *inputs, const scalar_t *embeddings, c
         case 3: kernel_grid_wrapper<scalar_t, 3>(inputs, embeddings, offsets, outputs, B, C, L, max_level, S, H, dy_dx, gridtype, align_corners, interp); break;
         case 4: kernel_grid_wrapper<scalar_t, 4>(inputs, embeddings, offsets, outputs, B, C, L, max_level, S, H, dy_dx, gridtype, align_corners, interp); break;
         case 5: kernel_grid_wrapper<scalar_t, 5>(inputs, embeddings, offsets, outputs, B, C, L, max_level, S, H, dy_dx, gridtype, align_corners, interp); break;
-        default: throw std::runtime_error{"GridEncoding: C must be 1, 2, 4, or 8."};
+        default: throw std::runtime_error{"GridEncoding: D must be 2, 3, 4, or 5."};
     }   
 }
 
@@ -630,7 +630,7 @@ void grad_total_variation_cuda(const scalar_t *inputs, const scalar_t *embedding
         case 3: kernel_grad_tv_wrapper<scalar_t, 3>(inputs, embeddings, grad, offsets, weight, B, C, L, S, H, gridtype, align_corners); break;
         case 4: kernel_grad_tv_wrapper<scalar_t, 4>(inputs, embeddings, grad, offsets, weight, B, C, L, S, H, gridtype, align_corners); break;
         case 5: kernel_grad_tv_wrapper<scalar_t, 5>(inputs, embeddings, grad, offsets, weight, B, C, L, S, H, gridtype, align_corners); break;
-        default: throw std::runtime_error{"GridEncoding: C must be 1, 2, 4, or 8."};
+        default: throw std::runtime_error{"GridEncoding: D must be 2, 3, 4, or 5."};
     }   
 }
 
diff --git a/kiui/mesh_utils.py b/kiui/mesh_utils.py
index b2657e7..56608a5 100644
--- a/kiui/mesh_utils.py
+++ b/kiui/mesh_utils.py
@@ -30,7 +30,7 @@
 
 
 def decimate_mesh(
-    verts, faces, target=5e4, backend="pymeshlab", remesh=False, optimalplacement=True
+    verts, faces, target=5e4, backend="pymeshlab", remesh=False, optimalplacement=True, verbose=True
 ):
     """ perform mesh decimation.
 
@@ -41,6 +41,7 @@ def decimate_mesh(
         backend (str, optional): algorithm backend, can be "pymeshlab" or "pyfqmr". Defaults to "pymeshlab".
         remesh (bool, optional): whether to remesh after decimation. Defaults to False.
         optimalplacement (bool, optional): For flat mesh, use False to prevent spikes. Defaults to True.
+        verbose (bool, optional): whether to print the decimation process. Defaults to True.
 
     Returns:
         Tuple[np.ndarray]: vertices and faces after decimation.
@@ -79,7 +80,8 @@ def decimate_mesh(
         verts = m.vertex_matrix()
         faces = m.face_matrix()
 
-    print(f"[INFO] mesh decimation: {_ori_vert_shape} --> {verts.shape}, {_ori_face_shape} --> {faces.shape}")
+    if verbose:
+        print(f"[INFO] mesh decimation: {_ori_vert_shape} --> {verts.shape}, {_ori_face_shape} --> {faces.shape}")
 
     return verts, faces
 
@@ -94,6 +96,7 @@ def clean_mesh(
     remesh=True,
     remesh_size=0.01,
     remesh_iters=3,
+    verbose=True,
 ):
     """ perform mesh cleaning, including floater removal, non manifold repair, and remeshing.
 
@@ -107,6 +110,7 @@ def clean_mesh(
         remesh (bool, optional): whether to perform a remeshing after all cleaning. Defaults to True.
         remesh_size (float, optional): the targeted edge length for remeshing. Defaults to 0.01.
         remesh_iters (int, optional): the iterations of remeshing. Defaults to 3.
+        verbose (bool, optional): whether to print the cleaning process. Defaults to True.
 
     Returns:
         Tuple[np.ndarray]: vertices and faces after decimation.
@@ -157,7 +161,8 @@ def clean_mesh(
     verts = m.vertex_matrix()
     faces = m.face_matrix()
 
-    print(f"[INFO] mesh cleaning: {_ori_vert_shape} --> {verts.shape}, {_ori_face_shape} --> {faces.shape}")
+    if verbose:
+        print(f"[INFO] mesh cleaning: {_ori_vert_shape} --> {verts.shape}, {_ori_face_shape} --> {faces.shape}")
 
     return verts, faces