Art
From Castle Wiki
Art in Castle refers to drawings and images that go together to make up the appearance of a Card. The ability to render artwork is a behavior of specific Blueprints in the card.
There are many different methods and styles for adding art to your blueprints. You can draw a doodle freehand, you can use vector lines and shapes, or you can upload images from your device's camera roll.
How to make Art
You can change the artwork of an actor by first selecting its blueprint, then pressing "edit" to open the inspector, and navigating to the General tab. At the top of the General tab, look for the list of artwork frames. Select an artwork frame to enter the art tool and begin making your artwork.