The existential road movie gets an offbeat, elliptical yet peculiarly compelling Transcaucasian makeover in director Hilal Baydarov’s second fiction feature, “In Between Dying.” Set against the striking, often purgatorially stark backdrop of Azerbaijan’s rural landscapes, with their striated mountains, autumn forests, fog-shrouded fields and silvery pebbled lakesides, it’s a film indebted to its influences. Baydarov was a student of Bela Tarr’s, although the additional imprints of Carlos Reygadas (who produces), Nuri Bilge Ceylan and Andrei Tarkovsky, with even a little Godardian absurdity thrown in for good measure, at least ensure this particular admixture eventually emerges as its own singular animal — in this case, a frequently glimpsed white horse, whose heroic associations are offset by its increasing dirtiness and apparent despondency.