Od question

How would I go about simulating dust in the air?
here is what I mean

I’m basicly looking to see if this could be done in a dio?
If so what would be needed and how to go about it

Airbrushed plexiglass??? Cheers! John.

Actually John, that IS how to do it. Airbrush it on a piece of glass placed in front of the model in a shadow box.