Pop-up flashes and lamp light can be harsh, glaring and detract any subtlety in tone and colour from the subject.
The makeshift background will usually go hand in hand with stripping the scene of any natural light and turning to lamp light or unnecessary flash. Pop-up flashes and lamp light can be harsh, glaring and detract any subtlety in tone and colour from the subject. Artificial lamp light especially will leave you with an abundance of orange and warm hues that are hard to counteract in the edit.