What is a key requirement for effective Chroma key lighting?

For effective Chroma key lighting, even lighting across the background is essential. This uniformity is crucial because it ensures that there are no variations in color and brightness that could interfere with the keying process. If the background lighting is uneven, it may create shadows or highlights that can lead to an imperfect key, making it difficult to separate the subject from the background cleanly.

Consistent lighting helps the chroma key software accurately identify and remove the background, resulting in a more polished and professional-looking final product. High contrast with background items, fluctuating shadow placements, and dynamic lighting can introduce complexity and challenges in achieving a clean key, as they can cause unwanted artifacts or inconsistent results in the keyed footage.