Polina in Florida asks:
How does everyone deal with light reflections on the walls that come from the mirrors or glass doors on the opposite walls and produced when using flash?
Do you control it at the shoot somehow or there is a good trick to edit these big lighter spots on the walls?
There are two primary ways to control reflections and shadows from flashes:
Which of these approaches you use depends on how much work you are willing to do in post processing.
If you are not familiar with blending flash and ambient layers in Photoshop, see this video tutorial on the subject.