Tugbot rgb-d camera has brightness grids

I’m trying to simulate rgb-d tugbot for my rgb-d slam(ROS2) project. I’m using ros_gz_bridge to transport topics and it’s successfull. But rgb image has brightness grids like this:


Note: Depth image hasn’t got this grids.

ROS2 Humble
İgn Gazebo Fortress
Ubuntu 22.04

Try shifting the camera a little forward. Maybe it sees a bit of the robot’s mesh?