Misonne would often photograph things that were strongly illuminated from behind, producing a halo effect. He would also retouch the lighting effects in his photographs, experimenting with and using many techniques, such as the Fresson process and later the bromoil and mediobrome processes. He also invented the "flou-net" and "photo-dessin" processes.
Léonard Misonne was a Belgian pictorialist photographer. He is known for his landscapes and street scenes with atmospheric skies.