diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
index c89d46a..930931d 100644
--- a/src/main/java/cactusServer/entities/Instance.java
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -3,6 +3,7 @@
 import java.util.HashMap;
 import java.util.HashSet;
 
+import org.ntlab.radishforandroidstudio.framework.model3D.BaseObject3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Object3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;
@@ -10,6 +11,11 @@
 import org.ntlab.radishforandroidstudio.framework.physics.AngularVelocity3D;
 import org.ntlab.radishforandroidstudio.framework.physics.Ground;
 import org.ntlab.radishforandroidstudio.framework.physics.Velocity3D;
+import org.ntlab.radishforandroidstudio.java3d.Appearance;
+import org.ntlab.radishforandroidstudio.java3d.IndexedTriangleArray;
+import org.ntlab.radishforandroidstudio.java3d.Material;
+import org.ntlab.radishforandroidstudio.java3d.Point3d;
+import org.ntlab.radishforandroidstudio.java3d.Vector3f;
 
 import cactusServer.entities.Entity;
 import cactusServer.entities.MovableObject;
@@ -53,10 +59,33 @@
 
 	private void initUniverse() {
 		universe = new Universe();
+		/*
 		// �X�e�[�W��3D�f�[�^��ǂݍ��ݔz�u����
 		Object3D stageObj = StageModelManager.getInstance().getStage(stageID).createObject();
 		stage = new Ground(stageObj);
 		universe.place(stage);
+		*/
+		
+		
+		IndexedTriangleArray groundGeometry = new IndexedTriangleArray(4,
+                IndexedTriangleArray.COORDINATES | IndexedTriangleArray.NORMALS, 6);
+        groundGeometry.setCoordinate(0, new Point3d(-20.0, -1.0, -20.0));
+        groundGeometry.setCoordinate(1, new Point3d(20.0, -1.0, -20.0));
+        groundGeometry.setCoordinate(2, new Point3d(20.0, -1.0, 20.0));
+        groundGeometry.setCoordinate(3, new Point3d(-20.0, -1.0, 20.0));
+        groundGeometry.setNormal(0, new Vector3f(0.0f, 1.0f, 0.0f));
+        groundGeometry.setNormal(1, new Vector3f(0.0f, 1.0f, 0.0f));
+        groundGeometry.setNormal(2, new Vector3f(0.0f, 1.0f, 0.0f));
+        groundGeometry.setNormal(3, new Vector3f(0.0f, 1.0f, 0.0f));
+        groundGeometry.setCoordinateIndices(0, new int[]{0, 3, 2});
+        groundGeometry.setCoordinateIndices(3, new int[]{0, 2, 1});
+        Appearance ap2 = new Appearance();
+        Material m2 = new Material();
+        m2.setDiffuseColor(0.5f, 1.0f, 0.2f);
+        ap2.setMaterial(m2);
+        Ground ground = new Ground(new BaseObject3D(groundGeometry, ap2));
+        universe.place(ground);
+        
 	}
 
 	public String getName() {