diff --git a/app/src/main/java/com/google/ar/core/examples/java/common/framework/RWT/RWTRenderer.java b/app/src/main/java/com/google/ar/core/examples/java/common/framework/RWT/RWTRenderer.java
index c6890bc..3eb9d61 100644
--- a/app/src/main/java/com/google/ar/core/examples/java/common/framework/RWT/RWTRenderer.java
+++ b/app/src/main/java/com/google/ar/core/examples/java/common/framework/RWT/RWTRenderer.java
@@ -64,6 +64,7 @@
 
 	@Override
 	public void onSurfaceChanged(GL10 gl, int width, int height) {
+//		GLES20.glViewport(0, 0, width, height);
 //		if (gc3D == null) {
 //			gc3D = new GraphicsContext3D(gl);
 //			viewer.setGraphicsContext3D(gc3D);
@@ -77,7 +78,8 @@
 
 	@Override
 	public void onDrawFrame(GL10 gl) {
-		GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
+//		GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
+		gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
 
 	    if(session == null) {
 	        return;
@@ -88,8 +90,6 @@
             Frame frame = session.update();
             Camera camera = frame.getCamera();
 
-			backgroundRenderer.draw(frame);
-
             if (viewer == null) {
                 viewer = new Viewer3D(camera);
             }
@@ -102,10 +102,12 @@
             }
             viewer.onDrawFrame();
 
+			backgroundRenderer.draw(gl, frame);
+
             // 3Dモデルのレンダリング
-//            gc3D.pushMatrix();
+            gc3D.pushMatrix();
             universe.render(viewer);
-//            gc3D.popMatrix();
+            gc3D.popMatrix();
 			helloArActivity.onDrawFrame(gl, frame, camera);
         } catch (CameraNotAvailableException e) {
             e.printStackTrace();