About Blueprints
Assassinations can be complex things, and it is often useful to plan your attacks in advance. This blueprint form allows you to reveal your plans and weapon ideas to The Umpire so that he can confirm it is within the rules. It also allows you to submit images and videos which can increase your chances of earning Kudos.
Images could be anything from photos of your weapon to hand drawn plans. If you have any PhotoShoping skills then editing these images to make them look bloodstained and awesome is fine.
Any images showing your face will likely be edited to protect your identity. If you wish to do this yourself then feel free.