Because, believing in everything at once is the same thing as believing in nothing.
-Life of PI
Pi’s mother raises him as a Hindu.But he start to believe in many other religion when he is teenage.Then his father tells him:”Because, believing in everything at once is the same thing as believing in nothing.” I think his his father is correct.
My first design:
I used various religion symbols to compose the ” 
” ,which means null set in math. But it is too literal. And it doesn’t have enough connection to the movie itself.
Pi ‘s ship is destroyed by the storm. He wants to survive from the disaster, he must have a very strong will. But at that stage, no god show up to protect him. However only the tiger accompany with him until he survived. As we know,the tiger is actually the spirit of himself. The tiger represent the wild aspect of him.
My second version :
All the god statue are drowning in the sea. I use a tiger head and human body to represent Pi.But I ‘m still not satisfied with this version. Because of the background doesn’t make sense.
My Third and Final version:
Personally, I quite like this version. Because every element appeared in the composition makes sense. The drowning gods. I design Pi as half tiger and half human. That means the wild side is always a part if human,no one can take away it,yet Pi can control and accept the it. As for the background ,I change is to a galaxy image. The reason is that there is a scene in the movie, (as shown below). It is at that moment,Pi understand the meaning of tiger. And he farewell to the past.
Thank you Ruimeng.