Are the actual lines on the ground defined by the actual white paint on the grass or by some laser beam?

Question

Follow-up of Why was Japan's second goal in the WC 2022 Japan-Spain match deemed to be valid?: are the actual lines on the ground defined by the actual white paint on the grass or by some laser beam (or some other way)?

Answer 1

According to https://www.reddit.com/r/worldcup/comments/zc03c5/are_the_actual_lines_on_the_ground_defined_by_the/iyud636/?context=3, the actual lines on the ground defined by the actual white paint.