diff --git a/tidy3d/components/viz.py b/tidy3d/components/viz.py
index cbc423fbe..7fb543b79 100644
--- a/tidy3d/components/viz.py
+++ b/tidy3d/components/viz.py
@@ -230,26 +230,28 @@ def plotly_sim(sim, x=None, y=None, z=None):
         geo = struct.geometry
         shapes = geo.intersections(x=x, y=y, z=z)
 
-        if len(shapes) > 0:
-            mat_index = sim.medium_map[struct.medium]
-            params = StructMediumParams(medium=struct.medium, medium_map=sim.medium_map)
-            color = params.get_plot_params().facecolor
+        if len(shapes) == 0:
+            continue
 
-            for shape in shapes:
-                xs, ys = shape.exterior.coords.xy
-                xs = xs.tolist()
-                ys = ys.tolist()
+        mat_index = sim.medium_map[struct.medium]
+        params = StructMediumParams(medium=struct.medium, medium_map=sim.medium_map)
+        color = params.get_plot_params().facecolor
 
-                plotly_trace = go.Scatter(
-                    x=xs,
-                    y=ys,
-                    fill="toself",
-                    fillcolor=color,
-                    line=dict(width=0),
-                    marker=dict(size=0.0001, line=dict(width=0)),
-                    name=struct.medium.name if struct.medium.name else f"medium[{mat_index}]",
-                )
-                fig.add_trace(plotly_trace)
+        for shape in shapes:
+            xs, ys = shape.exterior.coords.xy
+            xs = xs.tolist()
+            ys = ys.tolist()
+
+            plotly_trace = go.Scatter(
+                x=xs,
+                y=ys,
+                fill="toself",
+                fillcolor=color,
+                line=dict(width=0),
+                marker=dict(size=0.0001, line=dict(width=0)),
+                name=struct.medium.name if struct.medium.name else f"medium[{mat_index}]",
+            )
+            fig.add_trace(plotly_trace)
 
     for i, source in enumerate(sim.sources):
         geo = source.geometry