MADRID — Cannes Marche du Film’s Producers Network and Argentina’s Ventana Sur have inked a strategic alliance with Spain’s San Sebastian Festival, forging a film business triangle for Latin America and Europe.Deal plays off San Sebastian’s newly announced 1st Europe-Latin America Co-production Forum, which runs Sept. 27-28. The Marche du Film and Argentina’s Incaa film institute already co-organize Buenos Aires’ Ventana Sur, a highly successful Latin American pic mart. The new deal now forges synergies between September’s San Sebastian, December’s Ventana Sur and May’s Cannes’ Producers Network, fast-tracking select movie projects from production conception to sales. Announced Thursday, the partnership permits producers of six of the Forum’s European projects to present them at Ventana Sur. Mapping out a potential year-round financing and production itinerary for projects, the alliance also permits producers of the Forum’s Latin American projects to attend the Marche’s Producers Network or Producers’ Workshop, both key networking facilities for up-and-coming producers. San Sebastian runs a highly regarded pix-in-post showcase for Latin American pics, Films in Progress, plus a dedicated Latinos Horizontes sidebar, allowing Latin American producers to ring their options, presenting completed films, projects and productions. Ventana Sur attracts an ever-greater presence of Latin American producers who moot not only sales but co-production and shoot possibilities in Latin America with European and U.S. producers and sales agents. San Sebastian’s Forum will showcase 20 potential Europe-Latin America co-productions. Forum projects will be selected by Sophie Bourdon, Manuel Perez Estremera and Federico Veiroj. The 60th San Sebastian Festival runs Sept. 21-29.