diff --git a/app/src/main/java/com/google/ar/core/examples/java/helloar/HelloArActivity.java b/app/src/main/java/com/google/ar/core/examples/java/helloar/HelloArActivity.java
index 187eb79..306b916 100644
--- a/app/src/main/java/com/google/ar/core/examples/java/helloar/HelloArActivity.java
+++ b/app/src/main/java/com/google/ar/core/examples/java/helloar/HelloArActivity.java
@@ -379,70 +379,70 @@
       }
 
       // Visualize planes.
-      Collection<Plane> updatedPlanes = frame.getUpdatedTrackables(Plane.class);
-      for (Plane plane : updatedPlanes) {
-        if (placedPlane == null) {
-          placedPlane = plane;
-          Appearance ap = new Appearance();
-          ap.setTransparencyAttributes(new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.5f));
-          FloatBuffer vertices = plane.getPolygon();
-          vertices.position(0);
-          TriangleFanArray polygon = new TriangleFanArray(vertices.remaining() / 2, TriangleArray.COORDINATES, new int[]{vertices.remaining() / 2});
-          for (int i = 0; i < vertices.remaining() / 2; i++) {
-            polygon.setCoordinate(i, new float[]{vertices.get(i * 2), 0.0f, vertices.get(i * 2 + 1)});
-          }
-          polyObj = new Object3D("plane", new Shape3D(polygon, ap));
-          Pose p = plane.getCenterPose();
-          polyObj.apply(new Position3D(p.tx(), p.ty(), p.tz()), false);
-          polyObj.apply(new Quaternion3D((double) p.qx(), (double) p.qy(), (double) p.qz(), (double) p.qw()), false);
-          ground = new Ground(polyObj);
-          universe.place(ground);
-        } else if (plane.equals(placedPlane)) {
-          Appearance ap = new Appearance();
-          ap.setTransparencyAttributes(new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.5f));
-          FloatBuffer vertices = plane.getPolygon();
-          vertices.position(0);
-          TriangleFanArray polygon = new TriangleFanArray(vertices.remaining() / 2, TriangleArray.COORDINATES, new int[]{vertices.remaining() / 2});
-          for (int i = 0; i < vertices.remaining() / 2; i++) {
-            polygon.setCoordinate(i, new float[]{vertices.get(i * 2), 0.0f, vertices.get(i * 2 + 1)});
-          }
-          polyObj = new Object3D("plane", new Shape3D(polygon, ap));
-          Pose p = plane.getCenterPose();
-          polyObj.apply(new Position3D(p.tx(), p.ty(), p.tz()), false);
-          polyObj.apply(new Quaternion3D((double) p.qx(), (double) p.qy(), (double) p.qz(), (double) p.qw()), false);
-          universe.displace(ground);
-          ground = new Ground(polyObj);
-          universe.place(ground);
-        }
-      }
-
-/////////////////////////////////////////////////////////////////////////////////////
-// 以下は複数検出面に対応したコードだが、検出面が2個以上になるとちゃんと動かない?
-//
 //      Collection<Plane> updatedPlanes = frame.getUpdatedTrackables(Plane.class);
-//      if (updatedPlanes != null && updatedPlanes.size() > 0) {
-//        if (ground != null) universe.displace(ground);
-//        Object3D polygons[] = new Object3D[updatedPlanes.size()];
-//        int i = 0;
-//        for (Plane plane : updatedPlanes) {
+//      for (Plane plane : updatedPlanes) {
+//        if (placedPlane == null) {
+//          placedPlane = plane;
 //          Appearance ap = new Appearance();
 //          ap.setTransparencyAttributes(new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.5f));
 //          FloatBuffer vertices = plane.getPolygon();
 //          vertices.position(0);
 //          TriangleFanArray polygon = new TriangleFanArray(vertices.remaining() / 2, TriangleArray.COORDINATES, new int[]{vertices.remaining() / 2});
-//          for (int j = 0; j < vertices.remaining() / 2; j++) {
-//            polygon.setCoordinate(j, new float[]{vertices.get(j * 2), 0.0f, vertices.get(j * 2 + 1)});
+//          for (int i = 0; i < vertices.remaining() / 2; i++) {
+//            polygon.setCoordinate(i, new float[]{vertices.get(i * 2), 0.0f, vertices.get(i * 2 + 1)});
 //          }
-//          Object3D polyObj = new Object3D("plane" + i, new Shape3D(polygon, ap));
+//          polyObj = new Object3D("plane", new Shape3D(polygon, ap));
 //          Pose p = plane.getCenterPose();
 //          polyObj.apply(new Position3D(p.tx(), p.ty(), p.tz()), false);
 //          polyObj.apply(new Quaternion3D((double) p.qx(), (double) p.qy(), (double) p.qz(), (double) p.qw()), false);
-//          polygons[i] = polyObj;
-//          i++;
+//          ground = new Ground(polyObj);
+//          universe.place(ground);
+//        } else if (plane.equals(placedPlane)) {
+//          Appearance ap = new Appearance();
+//          ap.setTransparencyAttributes(new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.5f));
+//          FloatBuffer vertices = plane.getPolygon();
+//          vertices.position(0);
+//          TriangleFanArray polygon = new TriangleFanArray(vertices.remaining() / 2, TriangleArray.COORDINATES, new int[]{vertices.remaining() / 2});
+//          for (int i = 0; i < vertices.remaining() / 2; i++) {
+//            polygon.setCoordinate(i, new float[]{vertices.get(i * 2), 0.0f, vertices.get(i * 2 + 1)});
+//          }
+//          polyObj = new Object3D("plane", new Shape3D(polygon, ap));
+//          Pose p = plane.getCenterPose();
+//          polyObj.apply(new Position3D(p.tx(), p.ty(), p.tz()), false);
+//          polyObj.apply(new Quaternion3D((double) p.qx(), (double) p.qy(), (double) p.qz(), (double) p.qw()), false);
+//          universe.displace(ground);
+//          ground = new Ground(polyObj);
+//          universe.place(ground);
 //        }
-//        ground = new Ground(new Object3D("ground", polygons));
-//        universe.place(ground);
 //      }
+
+/////////////////////////////////////////////////////////////////////////////////////
+// 以下は複数検出面に対応したコードだが、検出面が2個以上になるとちゃんと動かない?
+//
+      Collection<Plane> updatedPlanes = frame.getUpdatedTrackables(Plane.class);
+      if (updatedPlanes != null && updatedPlanes.size() > 0) {
+        if (ground != null) universe.displace(ground);
+        ArrayList<Object3D> polygons = new ArrayList<>();
+        for (Plane plane : updatedPlanes) {
+            if (plane.getSubsumedBy() == null) {
+                Appearance ap = new Appearance();
+                ap.setTransparencyAttributes(new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.5f));
+                FloatBuffer vertices = plane.getPolygon();
+                vertices.position(0);
+                TriangleFanArray polygon = new TriangleFanArray(vertices.remaining() / 2, TriangleArray.COORDINATES, new int[]{vertices.remaining() / 2});
+                for (int j = 0; j < vertices.remaining() / 2; j++) {
+                    polygon.setCoordinate(j, new float[]{vertices.get(j * 2), 0.0f, vertices.get(j * 2 + 1)});
+                }
+                Object3D polyObj = new Object3D("plane" + (polygons.size() + 1), new Shape3D(polygon, ap));
+                Pose p = plane.getCenterPose();
+                polyObj.apply(new Position3D(p.tx(), p.ty(), p.tz()), false);
+                polyObj.apply(new Quaternion3D((double) p.qx(), (double) p.qy(), (double) p.qz(), (double) p.qw()), false);
+                polygons.add(polyObj);
+            }
+        }
+        ground = new Ground(new Object3D("ground", polygons.toArray(new Object3D[]{})));
+        universe.place(ground);
+      }
 /////////////////////////////////////////////////////////////////////////////////////