Add error message when mesh has >51.2k faces.

app.py

@@ -134,6 +134,15 @@ class ParticulateApp:
                         *[None] * 9
                     )
 
+        except ValueError as e:
+            # Surface validation errors (e.g., too many faces) directly to the UI
+            message = str(e)
+            if "faces > 51.2k" in message:
+                message = "Mesh has more than 51.2k faces; please reduce the face count."
+            return (
+                None, None, message,
+                *[None] * 9
+            )
         except Exception as e:
             import traceback
             traceback.print_exc()

infer_asset.py

@@ -118,7 +118,11 @@ def sample_points(mesh, num_points, sharp_point_ratio, at_least_one_point_per_fa
 
     if at_least_one_point_per_face:
         num_faces = len(mesh.faces)
-        assert num_points_uniform >= num_faces, f"num_points_uniform ({num_points_uniform}) < num_faces ({num_faces})"
+        if num_points_uniform < num_faces:
+            raise ValueError(
+                "Unable to sample at least one point per face: "
+                f"{num_faces} faces > 51.2k"
+            )
         
         # Get a random permutation of face indices
         face_perm = np.random.permutation(num_faces)