He gave up music training to study art at the Academy of Fine Arts in Kraków under Leon Wyczółkowski. Weiss originally painted historical or mythological paintings, but later switched to Expressionism after being profoundly influenced by Stanisław Przybyszewski.
Weiss's decision to leave music education led him to study art at the Academy of Fine Arts in Kraków under Leon Wyczółkowski. Initially, he focused on traditional historical or mythological paintings, but later developed a more expressive style after being deeply influenced by Stanisław Przybyszewski.