Additive

Keywords: Blending, Blendmode

Additive is a blending mode where the color of a translucent object is added onto the background color making it look bright and often glowy. In Photoshop this mode is known as Linear Dodge.

More blend modes and examples are explained below.

https://docs.unrealengine.com/en-us/Engine/Rendering/Materials/MaterialProperties/BlendModes