Not just that album. A good portion of the songs written by Anton Kabanen are based off of Berserk. He did this while he was still a member of Battle Beast, too.
Ok I know most of the time the cgi looks like shit but you got to give credit where credit is due , it work well for the action and the over all creepy ness of the apostles
Imo although I've never watched berserk the 2016 remake is so bad looking because its just poor cgi and can't even be classed as an anime whereas the anime ajin demi human is a good cgi anime because the animation is well done