I want to shoot a subject standing under a shower, with water misting off as it strikes the skin, showing only the silhouette of the bust, with a soft, textured backlight coming from a frosted glass window in the bathroom that is behind the subject in the shot.
My problem is that I can't capture the actual mist itself, which I wanted to. Even in exposures of a few seconds, the mist simply fades into a haze, basically averaging itself out.
Using a keylight in front of the subject causes a reflection in the tiles behind and lights up the subject, using a light directly perpendicular, from the side does not illuminate the mist itself, seemingly because the mist is too small to allow transmission.
On Camera Flash is similarly out of the question because it is lighting up too much of the silhouette and causing reflections. I have a Canon 1200D and the 18-55mm kit lens and 55-210 zoom. How do I capture the subject with the mist?