To make our kitchen lighting more realistic, we'll start by adding an irradiance volume. This object type has an inner boundary, outer boundary, and a matrix of light probes to approximate ambient light for a number of points in space. For the inner and outer boundaries, we simply move and scale them to the correct spot, then adjust the number of probes in the Properties window.
You can see an irradiance volume being used in the following figure:
Irradiance volumes with various wall thicknesses, inner boundaries, and outer boundaries to show their effects
Take a moment to look at ch07_irradianceTest.blend. This file has example ...
