The Bloom effect

Learn to soften bright areas with Bloom.

What is Bloom?

Bloom is the effect that adds light spreading around bright regions. Strong lights and bright surfaces look as if they carry the light. The threshold is the brightness limit that enters bloom; as the threshold rises, only the brightest regions are affected.

efekt.bloom.intensity.value = 1.5f;
efekt.bloom.threshold.value = 0.8f;

Bloom is used especially for light sources and reflections.

Glow and intensity

The halo of light created by bloom is called glow; a soft spreading appears around the brightness. The intensity decides the strength of this spreading. As the value rises, the halo gets wider and brighter.

glow = intensity * brightness;

An excessive intensity value can wash out the image, so it should be used in balance.

Exercise Bloom intensity

In a class named BloomEtkisi, define a string ad field with the value "Bloom" and an int yogunluk field with the value 3. In the Start method, increase yogunluk by 2 and print the text "Bloom yogunlugu: " joined with yogunluk using Debug.Log.

Show example solution

using UnityEngine;

public class BloomEtkisi : MonoBehaviour
{
    string ad = "Bloom";
    int yogunluk = 3;

    void Start()
    {
        yogunluk += 2;
        Debug.Log("Bloom yogunlugu: " + yogunluk);
    }
}

Test yourself

What happens when the threshold value rises in Bloom?
```
threshold = 0.2f;
threshold = 1.0f;
```
- Shadows get softer
- The color tone changes
- Bloom spreads over the whole image
- Only brighter regions enter the bloom
Show answer

Only brighter regions enter the bloom — Threshold is a brightness limit; as it rises, regions below it stay out of the bloom.

Set the brightness limit

    bloom.____ = 0.8f;

Show answer

    bloom.threshold = 0.8f;

Bloom settings

Bloom

Light spreading from bright areas
Glow

Light halo around bright areas
Threshold

Brightness threshold for Bloom
Intensity

Strength of light spreading

Next lesson: Color Grading

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