How to create masks (in 3D) in Blender

Hi everyone! Recently, a new addon ("Rotobezier", developed by Daniel Salazar, alias Zanqdo) was added to Blender, and I needed to make a tutorial about it, because it's an addon that makes a lot easier to animate bezier curves :D

Bezier curves have a lot of applications if animated, but one of them is the ability of using them as masks on the blender compositor. This tutorial talks about how to use and animate curves using this addon, and how to use them as masks in compositing :) I put this tutorial the Expert label because you'll need to have the Blender Basics covered in order to make all the steps and understanding them :) Hope you like it, and the next one will be the Materials, Lights & Render Part 2! See you!