After op commented that my picture is super under-exposed, I tried post using Google Photos. But when I increased the exposure, I saw some unwanted white "waves" or rows in the photo. The edges of these rows, when you zoom in closely, looks like "Pacman squares". Original picture is shot through f/8, 30secs, ISO 200, ec -1. Shot through Fujifilm X-T100 mirrorless camera with focal length 15-45 mm, max aperture of 3.61, pattern metering mode. What can I do during the shoot and during post to solve these? I just started photography less than a week ago, and would like to learn as much as possible. Thank you ! :)
OP comment is from this thread: How do I take a photo so the moon doesn't have bright "rays"?