A one or two sentence summary of the paper
Ed Catmull's description of the early system for generating 3D animated
movies he developed

A one or two sentence description of the problem the paper is trying to
solve.

How to capture, animate, and render a simple 3D animation

A one of two sentence description of the method used to solve the
problem.

Ed captured a model of his hand using a plaster of Paris model with
geometry drawn on it and storing the geometry in a hierarchical structure
he developed.  He animated it with a descriptive language he developed,
and rendered it using a pipeline also developed for the paper.

A list of short (approx one sentence) descriptions of the key ideas of
the paper.

This paper combined new techniques for 3D rendering and ideas about
controlling animation into a cohesive system.

A list of short (approx one sentence) descriptions of the contributions
of the paper.

This paper contributed the idea of hierarchical descriptions of 3D data
and user-specified axes of rotation.  It was also the first system for 3D
computer animation.

Any questions that the paper raises for you. This might be some flaw that
they do not address, something that is unclear, some piece of background
knowledge that you don't have that would help you understand the paper,
...

The only thing I wondered about in this paper was historical context; I
wondered about how much of what Ed was doing had already been done, and
how many pieces of it already existed before he developed his system.