Community Tutorial: Unreal Engine 5. How to render Alpha channel.

In this lesson I’ll show you 3 different methods how to render alpha channels from your cinematics using the sequencer in Unreal Engine 5.

What Does Alpha Channel Mean?
The alpha channel is a color component that represents the degree of transparency (or opacity) of a color (i.e., the red, green and blue channels). It is used to determine how a pixel is rendered when blended with another.

Explains Alpha Channel
The alpha channel controls the transparency or opacity of a color. Its value can be represented as a real value, a percentage, or an integer: full transparency is 0.0, 0% or 0, whereas full opacity is 1.0, 100% or 255, respectively.

https://dev.epicgames.com/community/learning/tutorials/G3GX/unreal-engine-5-how-to-render-alpha-channel