ap photo Producers Darya Bassel, left, and Yelizaveta Smith, right, wearing t-shirts that have an image of an explosion on the front and read “Sensitive Content: Russians kill Ukrainians. Do you find it offensive and disturbing to talk about this genocide?” pose with director Maksym Nakonechnyi who wears a t-shirt that reads “Free Tayra” in reference to Julia Paevska, aka Tayra, a Ukrainian medic who Russian forces have taken captive at the photo call for the film ‘Butterfly Vision’ at the 75th international film festival, Cannes, southern France on Wednesday.

CANNES, France — The war in Ukraine took a starring role on the opening night of the 75th Cannes Film Festival and it has rarely been far out of frame since.

The parties have continued nonstop, as has the red-carpet frenzy. But throughout the French Riviera spectacular has run a discourse about the role of cinema in wartime. Movie screens have lit up with footage from the front lines and films with trenchant meaning in relationship to the conflict.

Sergei Loznitsa, one of Ukraine’s most acclaimed filmmakers, was putting the finishing touches on his documentary “The Natural History of Destruction” when Russian invaded Ukraine in February. The film, which premiered Monday in Cannes, uses extensive archival footage to depict the Allied bombing campaign of Germany during World War II. The question at the heart of the film, inspired by W.G. Sebald’s 1999 book of the same name, is about the morality of targeting civilian populations in times of war.

With Russian bombs falling on maternity hospitals, theaters and other places crowded with sheltering civilians, “The Natural History of Destruction” transformed into a film less about the past than the present.

“It became clear that the lessons of 80 years ago haven’t been learned,” said Loznitsa in an interview. “It seems possible for us as humans to be thrown back 80 years to the stage where all these atrocities and terrible things were possible.”

“If we want to remain human, we need to stop this,” added Loznitsa, the director of “Donbass” and “Babi Yar.” “This should not be acceptable to a civilized society.”

The Cannes Film Festival was born out of war. The start of World War II forced the postponement of the inaugural festival, in 1939. Cannes was initially conceived as a counter to the Venice Film Festival, which had then fallen under the influence of Mussolini and Hitler.

This year’s festival has unspooled against the backdrop of the war in Ukraine, and sometimes in spite of it. Sit-ins haven’t replaced late-night soirees on the Croisette, nor has attention wavered substantially from the parade of stars posing in front of barricades of photographers. Jet fighters have been airborne here, but only to promote Tom Cruise’s “Top Gun: Maverick.” After two years of pandemic, Cannes has very eagerly gotten back to frolicking in the Cote d’Azur sun.

On opening night last week, Ukrainian President Volodymyr Zelenskyy challenged filmmakers to take up the mantle of Charlie Chaplin’s “The Great Dictator” and “demonstrate that the cinema of our time is not silent.” And in the days that have followed, the role of cinema while thousands are dying in Ukraine has been an ongoing dialogue — and Cannes has been a platform for protest.

One woman burst onto the red carpet and shed her clothes to reveal the Ukrainian flag painted on her torso, blood drawn on her body and the message “Stop raping us.”

On Wednesday, the producers of the Ukrainian film “Butterfly Vision,” by Maksym Nakonechny, wore t-shirts with an image of an explosion on the front that read “Sensitive Content: Russians kill Ukrainians. Do you find it offensive and disturbing to talk about this genocide?”

“War is about killing people. It’s about destroying everything,” said Kirill Serebrennikov, a Russian filmmaker who has fled his homeland after several years of home arrest and travel ban. “Art is always against war.”

The very presence of Serebrennikov, who premiered the period drama “Tchaikovsky’s Wife,” at Cannes has been much debated. His film was partly financed by Russian oligarch and former Chelsea owner Roman Abramovitch. Cannes’ artistic director, Thierry Fremaux, acknowledged on the eve of the festival that he had wrestled with the decision but ultimately decided to screen “Tchaikovsky’s Wife” since the film took funding from Abramovitch before sanctions were enacted, and because Serebrennikov challenges state propaganda.

Cannes, a kind of Olympics for film, elected to ban Russian delegates and Russians with ties to the Kremlin. In most years, the yachts of Russian oligarchs are a regular presence off the Cannes shores.