Irradiance
Irradiance
offers a way of achieving global illumination effects without using
photons. This is accomplished using the Final Gathering algorithm
which calculates illumination by casting rays from objects in the
scene, rather from the lights.
The setup of
a irradiance-based illumination model involves the creation of a
global illumination shader that is assigned to a light source and
a few changes to the render output settings.
How
to set up irradiance background illumination - In this
lesson, you will learn how to use the background settings on a global
illumination light to create a scene's illumination. The background
can also be replaced by a High Definition light probe for
How
to use irradiance with direct lighting - In this lesson,
you will learn how to create global illumination effects using the
bounced light generated by various direct light sources.
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