User Manual

Bloom Effect

Bloom is a post-processing effect used to reproduce an imaging artifact of real-world cameras. The effect produces fringes (or feathers) of light extending from the borders of bright areas in an image, contributing to the illusion of an extremely bright light overwhelming the camera capturing the scene. (from Wikipedia)

Here is an image without bloom:

Image without effect

and the same image with bloom applied:

Image with effect

The built-in bloom effect has the following attributes: