Progressive meshes are like playing with Lego blocks! You start with a big pile of blocks and build something with them, like a house or a car. But what if you want to change the way your house or car looks? You could take it apart and start over, but that would take a lot of time and effort.
Instead, with progressive meshes, you can change your creation by taking out some blocks and adding new ones without starting over from scratch. This makes it much easier and quicker to make changes!
In computer graphics, like in video games, progressive meshes are used to make 3D objects (like the characters or the environment) look more realistic and move smoothly. They work by dividing the object into small pieces called triangles (just like how Lego blocks are small pieces too!)
But sometimes, too many triangles can make the computer work too hard and slow everything down. That's why progressive meshes are used - they can make the object look just as detailed but use fewer triangles, which saves space and processing power.
So just like how you can build and change your Lego creation by taking out and adding pieces, progressive meshes in computer graphics let creators change an object without starting over from scratch, and they make the object look more detailed while using fewer parts!