https://en.wikipedia.org/wiki/Soviet_art
> However, art exhibitions of 1935–1960 disprove the claims that artistic life of the period was suppressed by the ideology and artists submitted entirely to what was then called ‘social order’. A great number of landscapes, portraits, genre paintings and studies exhibited at the time pursued purely technical purposes and were thus free from any ideology. Thematic painting was also approached in a similar way
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> The death of Joseph Stalin in 1953, and Nikita Khrushchev's Thaw, paved the way for a wave of liberalization in the arts throughout the Soviet Union. Although no official change in policy took place, artists began to feel free to experiment in their work, with considerably less fear of repercussions than during the Stalinist period.
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> The most infamous incident regarding nonconformist artists in the former Soviet Union was the 1974 Bulldozer Exhibition, which took place in a park just outside of Moscow, and included work by such artists as Oscar Rabin, Komar and Melamid, Alexandr Zhdanov, Nikolai Smoliakov and Leonid Sokov. The artists involved had written to the authorities for permission to hold the exhibition but received no answer to their request. They decided to go ahead with the exhibition anyway, which consisted solely of unofficial works of art that did not fit into the rubric of Socialist Realism. The KGB put an end to the exhibition just hours after it opened by bringing in bulldozers to completely destroy all of the artworks present. Fortunately for the artists, the foreign press had been there to witness the event. The world-wide coverage of it forced the authorities to permit an exhibition of Nonconformist Art two weeks later in Izmailovsky Park in Moscow.
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> By the 1980s, Mikhail Gorbachev's policies of Perestroika and Glasnost made it virtually impossible for the authorities to place restrictions on artists or their freedom of expression. With the collapse of the Soviet Union, the new market economy enabled the development of a gallery system, which meant that artists no longer had to be employed by the state, and could create work according to their own tastes, as well as the tastes of their private patrons. Consequently, after around 1986 the phenomenon of Nonconformist Art in the Soviet Union ceased to exist.