Oh yes, you are so right!
I have a friend who has a house on a mountain in North Carolina. He was out one night snapping pictures of the night sky. When he loaded the pictures on his computer, something very unusual appeared. At the upper edge of a tree there was some sort of creature that was showing up as an electrified image; looked like sparks making up a body of an odd creature. He showed the photo to an Indian chief in the area; the chief was familiar with these invisible creatures.

Yes, it is as you write. I've been noticing this for a long time.
Entities move in the astral plane. In order to be able to move in the physical plane, they must somehow get a "means of transport" for themselves. So they are parasites, for example on people. Cameras can capture it. A cinematographer told me years ago that the best way to capture these "creatures" and "shadows" is just before or after dark, when there is still light, at sunset or sunrise. That moment lasts about 10 minutes in the evening and in the morning. I've never tried it, but I believe it's true. Evidently, according to what you write, it is also possible at night, in the light of the moon?
I think it depends on the light, how it is set at the time of taking the photo - either the sun or the lamp.
Wow, light is the key to passing from the physical to the astral level and vice versa. Human with soul have light inside body and pure humans glow.
I sense it in others, that's why I recognize those without souls.