MADRID — Spain’s Carlos Saura is attached to direct “33 dias,” about Pablo Picasso’s emotional turmoil as he painted his masterpiece “Guernica.”Picasso’s mural captured his reaction to the destruction of the Basque town of Guernica in 1937 by the Nazi Luftwaffe during the Spanish Civil War. It also coincided with a crisis in Picasso’s relationship with his lover, Dora Maar. Project reteams Saura with Elias Querejeta, producer of Saura’s “The Hunt,” “Raise Ravens” and “Deprisa, deprisa.” Saura and Querejeta penned the script with Gaul’s Louis-Charles Sirjacq. Budgeted around €6 million ($7.7 million), pic is produced by Bilbao-based Idem 4. Cinevedas, with offices in France, Canada and India, will co-produce. Cinematographer Vittorio Storaro (“Apocalypse Now,” “Reds,” “The Last Emperor”) is in advanced negotiations to join the project, per producer Alberto Rojo. “33 dias” would be Saura and Storaro’s seventh collaboration. The French- and Spanish-language shoot rolls next summer in Paris and Guernica, where producers will reproduce Picasso’s Paris studio. Producers are now casting, with French thesp Jose Garcia tipped as Picasso.