Bloom

Bloom is a post-process effect that diffuses very bright pixels. This mimics lens artifacts of real cameras. This allows a better sense of what the actual intensities of the pixels are.

Reference

Panel:

Render ‣ Bloom

Threshold

Filters out pixels under this level of brightness.

Knee

Makes transition between under/over-threshold gradual.

Radius

Bloom spread distance.

Color

Color applied to the bloom effect.

Intensity

Blend factor.

Clamp

Maximum intensity a bloom pixel can have.