This has probably been answered a million time. Here is the Use Case:
I have a battle scene where the camera is rotatable around positive Y. The battle mechanics allow you to select your ship, then click anywhere on the Z plane and issue a move command. I was wondering is there is a simple way to display an infinite grid along the Z plane when you select your ship in order to give the user a sense of spacial context?
Almost like the Mass Effect image below but with a grid plane instead.