Final answer:
Georg II, Duke of Saxe Meiningen developed a realistic staging technique using large stage pictures and historically accurate costumes and sets.
Step-by-step explanation:
The realistic staging technique that used large stage pictures and historically accurate costumes and sets was developed by Georg II, Duke of Saxe Meiningen.
He introduced a more naturalistic aesthetic, focusing on relatable acting style and cohesive production. His attention to detail made a significant impact on theater during that time period.