Complex sentence: There may be an extra step for particularly effect-intensive productions, such as film, TV, or Broadway-style stage shows, where the crew tests any special effects that require systems such as rain, fire, or explosions.
Split into simpler sentences: There may be an extra step added if working on a particularly effect intensive production such as Film, TV, or Broadway-Style stage show. This step is reserved for doing any special effects that require the testing of a system such as rain, fire, or explosions.