I'm creating a documentary and I am searching for the correct term to use to describe a lighting effect. I'm thinking highlight or backlight, but when I look them up they have different meanings than what is actually happening.

Here's the situation: When a translucent object is in front of the camera, much of what is behind it can be seen by the camera. An example would be a raindrop falling close to the lens. The objects behind the raindrop may be distorted or blurred, but nonetheless if it is a tree, it is still obviously recognizable as a tree.

In a nighttime situation when a flash is used, the part of the object behind the raindrop is brighter than the rest of it. In essence, the combination of the raindrop and the flash are highlighting the small portion of the tree that is directly behind the raindrop.

So my question is: What is the correct term to use when the scenery directly behind a translucent object has brighter illumination than the surrounding scenery.