There's more...

The specific type of Bloom we've seen in the present chapter is one aimed at video games or real time applications in particular. However, Epic Games has recently introduced a different type that can be considered a bit more high quality, called Bloom convolution.

This new effect lets users include their own custom bloom kernel shapes, which is a texture that can depict physically accurate bloom effects as seen through a camera or our eyes. To enable it, just tick the Method checkbox in the Lens section of our post process volume or camera and change the value from Standard to Convolution. Once that's done, we'll be able to change the Convolution kernel used as a texture for this effect; again, tick the checkbox with that same name and select any texture that you might desire. By default we'll get an effect similar to this one:

In the previous screenshot, we've also set the Convolution boost Mult to 100 in order to make the effect perfectly visible. You can do so if you head over to the Advanced section of the Bloom category and look for that setting.