Info about Cel animation

Here is some information I now know after reading this wikipedia article to help with our animation.

• Cel animation (or handrawn animation) is the oldest form of animation.
• Normally there is a lead animator who draws the keyframes, then all the others will fill the gaps.
• Traditionally, all frames are drawn by hand, but now computers are helping, and som new effects can be used. (Now it's possible to draw directly onto a computer,
• Animation loops are often used.
• For special effects such as smoke before CGI, animators resorted to other media such as charcoal or airbrushes to achieve the effect.