What is the minimum height of the studio where people are photographed?

It is recommended to be more than 3 meters tall, because the light sometimes hits from top to bottom, which is much higher than people. If it is too low, it is not impossible, just subject to certain constraints.

You can install the background cloth with the background bracket, one on each side, and then put the cloth on it. As long as the background shaft is firmly fixed, don't fall and hurt people.

As long as the background is larger than people's area, you won't wear it all over. For reference.