https://mattepaint.com/academy/tutorial/deconstructing-light/

Understanding how light interacts in our atmosphere is key to recreating a photoreal environment in your artwork. In this video we cover how light works in the real world and how we can use that understanding to integrate any object. By understanding the fundamentals of light you'll be able to understand exactly why an object looks out of place, or conversely, why it looks photoreal. Make sure to check out the "Halfway To Black" video for a complimentary look into understanding this.