Figure 6.27 - Irradiance Volume in the scene

The Irradiance Volume has a box-like shape, and it identifies an area

where Eevee will later process indirect light bounces. Only what is inside

the Probe volume receives indirect light bounces. You can add as many

of those Probes as you need.

The next probe we will need is a Reflection Cubemap that captures

reflections and cast them in glossy surfaces. Press SHIFT+A again and

from the Light Probes group, add a Reflection Cubemap. Using the G

key, raise the probe from the ground level and place it in your scene's

middle.

Unlike an Irradiance Volume with a box-like shape, a Reflection

Cubemap has a default shape of a sphere. Use a scale transformation to

increase your probe's size until it becomes bigger than your scene

(Figure 6.28).