Rasta filtering is a process where you take a picture or an image and make it look different by using a special kind of technique. Imagine you have a coloring book and you want to color one of the pages with a new technique which makes it look different than a regular coloring book. This is what rasta filtering does to your image. It changes the way colors look in your image and makes it look more exciting and different. Think of it like adding new flavors to your ice cream, it's still ice cream but it tastes different and more interesting. So, with rasta filtering, you can change the way your image looks without changing its original shape or subject.