Complex sentence: However, since digital post-production techniques became the standard in the early 2000s, the majority of movies, whether photographed digitally or on 35mm, have been mastered and edited at the 2K resolution, however 4K post production is becoming more common (Dec 2013).
Split into simpler sentences: However, since digital post-production techniques became the standard in the early 2000s, the majority of movies, whether photographed digitally or on 35 mm film, have been mastered and edited at the 2K resolution. Moreover, 4K post production is becoming more common (Dec 2013).