His paintings developed angular lines and fragmentation which, as in his early masterpiece Afgang (Departure), show a tendency towards Futurism.
From 1921 to 1928 he was employed as a sculptor by the Royal Copenhagen porcelain factory, for whom he produced a series of ceramic sculptures on Biblical subjects[4] which included the Good Samaritan and several versions of Jacob wrestling with the Angel.
These pots are decorated with figures, mainly in relief but also engraved or painted, generally representing Biblical subjects.
According to Ulla Grut "The resulting figures, for example 'The Potter', have a vigour of modelling and monumental effect that overrides the boundary between painting and sculpture.
"[3] Jais Nielsen decorated some of the Danish bookbinder August Sandgren's vellum bindings in water colour.