Igor Vieru is regarded as a key figure within the mid-century Moldovan school of painting, whose members worked towards a coherent visual language grounded in local culture and contemporary artistic developments. His formation occurred largely outside formal academies. He taught French in rural schools and produced instructional images on glass, a practice that fostered an early concern for clarity, structure and the didactic potential of the visual field. These works prefigure the disciplined line and the measured compositional balance that later define his mature production. 

His early environment, marked by a family interested in drawing and folk craftsmanship, oriented him towards vernacular forms and encouraged a sustained engagement with artisanal aesthetics. Upon his return to the region after the war, he brought with him an extensive body of books that served as the foundation for his self-directed study. This attention to both textual and visual sources informed his development of a pictorial vocabulary that connects local heritage with a modernised mode of representation. 

Vieru’s role in shaping a national school of painting is closely linked to his collaboration with Mihai Grecu and Valentina Rusu-Ciobanu. Together they advanced a set of principles based on narrative clarity, controlled chromatic decisions and an informed understanding of rural subjects. His paintings operate through a measured interplay between direct observation and a carefully constructed poetic register, allowing his work to maintain an identifiable cultural grounding without resorting to ornamental excess. 

His activity as an illustrator further consolidates his position within Moldovan cultural institutions. His book illustrations reveal a precise sense of line and an ability to translate literary motifs into accessible visual forms, features that enhanced the circulation and recognition of his work.