What is the primary purpose of using a 3D animation as a reference for 2D animation in Blender, as described in the video?

To rotoscope over an animated 3D model using Grease Pencil.

According to the video, where did the character armature originate, and what was its initial purpose?

The character armature originated from Maximo and was used for posing and animation.

To make the Grease Pencil strokes move with the camera's perspective.

To keep track of the movement and consistency of elements like hair and clothing between frames.

I can rotoscope a 3D animation using Grease Pencil in Blender 2.81.

1
Rotoscoping in Blender 2.81 involves using a 3D animation as a reference for 2D animation with Grease Pencil.
2
The process includes positioning a character armature, animating the camera, and then parenting the grease pencil layer to the camera to trace key poses.
3
Using onion skinning helps maintain consistency in animations, and concept art serves as a reference for details like costume lines and colors.