In most instances light is invisible: we don't see the light but we know it's there. However, there are times when we want our light to appear to have volume, like if we were creating spotlights at a concert or car headlights shining forward. Light can be visible in instances like this where we have something like a smoke, fog, or rain in the atmosphere. So let's learn how to activate visible light in this recipe, where we will be creating a flashlight shining in a dark room.
First, let's take a look at our scene. It's a small room with a flashlight in the center, and there is a circuit breaker panel on the wall. Let's simulate that the power has gone out and we need to use our flashlight to find it. Start by turning down the Intensity option of the light labeled Ambient Light to something very small, such as 10%; this will give us just a tiny amount of...