The Rebel (1961)

Tony Hancock as artist Anthony Hancock

Self Portrait

Ducks In Flight

Self Portrait

Aphrodite at the Waterhole

The Rebel on IMDB  'Hancock plays a downtrodden London office clerk who gives up his office job to pursue full-time his vocation as an artist. Single mindedly, and with an enthusiasm far exceeding any artistic talent (his "art" has a "childlike" quality - to put it mildly), he sets to work on his masterpiece Aphrodite at the Waterhole, moving to Paris where he expects his genius will be appreciated. While his "ideas" and persona gain acceptance (indeed plaudits) among the "beat" set, legitimate art critics (e.g. George Sanders) scoff at his work. He manages to achieve success, however, when the work of his former roommate, another artist, becomes confused with his own. The confusion is eventually resolved after a series of art exhibitions, and he returns, down but not out, to London, where he pursues his "art" in defiance of whatever others may think of it.' read more on Wikipedia

All of the paintings made for the film are by the artist Alistair Grant