As a game developer, we mockup a lot of VFX (glowing things), and additive blending (which is simplistic and affordable in a game engine and glows brighter than something like Overlay) is fundamental to the work. I have artists who don’t know Photoshop but do know Figma, and they can’t mockup anything that glows.

This blend mode is called various things in different applications, such as Add, Additive, Linear add, and Linear Dodge. Pick a name, but it needs to be available in your app.