system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:In cartoons, certain clothing patterns such as checkered or plaid, it seems like it's a static pattern that the characters move around on. Why is this, and how is it done?
gpt
On a technical level, their shirt is actually transparent, and there is a layer with the picture of the pattern behind the layer the character is drawn on. The character and their shirt moves, but the background layer does not, resulting in what you've described.

The reason for doing this is that its a cheaper/faster/easier way to animate clothing with those types of patterns. The alternative is redrawing the whole thing each time the character moves slightly.