The family was upper middle class; His father had started as a painter, but later succeeded in the business of manufacturing paints and lacquers.
[1] It was thanks to a painting he had published in Ude og Hjemme that his reputation began to evolve as he came in contact with young Danish naturalists.
It was not long before Fischer gained fame as a painter of cities, not just Copenhagen, but scenes from Scandinavia, Italy and Germany, reaching his zenith between 1890 and 1910.
Around this time, he also painted bright, sunny bathing scenes, some with nude women, and developed an interest in posters, inspired by Théophile Steinlen and Henri de Toulouse-Lautrec.
[4] During the period when he actively painted, Danish art was dominated by Laurits Tuxen.