In bold and unusual colours, Lacasse renders the fragmentation of the bedrock and the light playing on it. The clever colour-combination makes the planes move, like a slab is to come off any minute.
Lacasse was an eminent painter of the Ecole de Paris. He settled in a studio next to Brancusi and became firm friends with Robert and Sonia Delaunay, and the left-wing socialist thinkers of the time.
Brancusi inspired Lacasse to revisit his teenage interest in light and the composition of rocks - this led him to make a series of small abstract paintings during the 1930s. His acquaintance with Robert Delaunay influenced his coloristic development. Upon his return to Paris in 1946, after having spent the war years in Britain, Lacasse had been overshadowed by Serge Poliakoff, who admitted having learnt much from Lacasse during the late 1930's during his visits to Lacasse's Montparnasse's gallery 'l'Equipe'. But this still was a blow to Lacasse and in need for reconnaissance Lacasse painted a glorious series of ' Balancements' in which he combines power , colour and poetry laid down with a vigorous impressionist brush-stroke, as well as a series of hard edge geometrical abstractions.