Is the key lighting artist profession allowed in Islam where the person is working for clean content and is only providing lighting effects through software and not involved in drawing any pictures?
It depends on the nature of the work. It is allowed as far as the key lighting has really clean content according to Islamic rules and values.
If the work has any act which is unlawful in Islam e,g, non Hijab, songs , sinful music etc, then any participation in it including key lighting will not be permissible, but if it does not have any unlawful act, then it will be allowed.
Wassalam.