How to open rviz to display the point cloud of r200

[2000222]

Hello, thanks a lot for this interesting project. I have followed your instructions to successfully run

roslaunch realsense_gazebo_plugin realsense.launch
roslaunch realsense_gazebo_plugin depth_proc.launch

Then I want to open rviz to display the point cloud information, so I just run

rosrun rviz rviz

But I display nothing :disappointed: , maybe I did not display the image or information correctly. Could u pls explain more, thank you.