When I am trying to move my camera (player) I see lot of lines
You’ve got seams!
You are aligning objects in the scene that do not butt up against each-other perfectly. This could be because you are setting them to whole number positions but they have floating point dimensions. Honestly there are a lot of things this could be, but the basics of it is that things are not flush with each other.
Do you think their is any way to fix?