Alt-rock star Nick Cave has been stretching the limits of creativity in music, writing and film for over 30 years, and recently celebrated a unique milestone in a signature surreal way with his quasi-documentary ‘20,000 Days on Earth.’ Cave gives frank insights into his life and an intimate portrayal of the artistic process in the dreamlike film, which melds the real and imaginary in a fictitious portrait of Cave’s 20,000th day, with appearances by the likes of writer Warren Ellis, actor Ray Winstone and singer and actress Kylie Minogue as well as Cave’s family and friends. 20,000 Days on Earth screens on Tuesday, Dec. 30, at City Winery, 1030 Main St., Napa. 7pm. $10. 707.260.1600.