Complex sentence: Currently he is working on the pre-production of a short-film called Orbs and is collaborating with the pre-production of a short-film leading to a major feature film called Dreamlocks based in an original novel by Caiseal Mor.
Split into simpler sentences: Currently he is working on the pre-production of a short-film called Orbs. He is also collaborating with the pre-production of a short-film that will lead to a major feature film called Dreamlocks based in an original novel by Caiseal Mor.