1. A computer-implemented method for viewing a change that is made to a scene of a computer animation, the method comprising: receiving a first user input representing selection of a first visual characteristic for an animation asset in the scene of the computer animation; receiving a second user input representing selection of a second visual characteristic for the animation asset in the scene of the computer animation, wherein the first visual characteristic and the second visual characteristic are different; rendering a first frame of the scene, from a first virtual camera position, based on the first visual characteristic but not the second visual characteristic, wherein the first frame includes the animation asset with the first visual characteristic; rendering a second frame of the scene, from a second virtual camera position, based on the second visual characteristic but not the first visual characteristic, wherein the second frame includes the animation asset with the second visual characteristic; concurrently displaying the first frame and the second frame; receiving a third user input representing selection of a third visual characteristic for the animation asset in the scene of the computer animation; rendering a third frame of the scene from the first virtual camera position; and concurrently displaying the third frame and the second frame.