We all wear a mask throughout our life that we believe defines who we are. We are defined by our appearances, wealth, or knowledge. Hamlet realizes that we are all going to take off our masks at death. Underneath our mask we are all inherently the same.
Relationship between life and death. inside, outside: No information about this but it is two different photographs put together to create a half skull, half face image. That heavily relates to the theme of inside, outside and in between.
(deep) Prep work for my art exam to represent disguise - What we see in ourselves isn't always what others see when they look at us, we disguise ourselves with makeup and fake smiles to avoid the questions.