Since he concealed the accident out of fear of his father, without medical treatment his back became so deformed that he had a hump for the rest of his life.
Instead, he studied at the Hochschule für Grafik und Buchkunst Leipzig from 1891 and at the Akademie der Bildenden Künste München from 1894, as well as one year at the Kunstakademie Düsseldorf.
For the church, which was built from 1901 to 1904 according to plans by the architect Raymund Brachmann (1872-1953) for the merchant Max Haunstein, he created the interior design of one of the most beautiful Jugendstil villas in Leipzig.
He designed many illustrations as well as book decorations for children's and youth publications, especially for the publishing house of Eugen Diederichs (1867–1930).
In 1904 Horst-Schulze obtained a teaching post at what was now the Royal Academy for Graphic Arts and Book Trade in Leipzig, which was converted into a professorship in figurative painting in 1911.