Overview
The Sky Light is an environment light configured to use the 3Delight Sky shader.
Since they tend to interfere with object selection, Sky Lights are not shown in the Viewer.
Only one Sky Light may be rendered at a given time. A Sky Light and an Environment Light cannot be rendered together.
A sky light in the GafferThree node parameters.
Object Parameters
The Object parameters of a sky light.
Material Parameters
The 3Delight Sky shader can be used for image-based lighting of daylight conditions. It is very well suited as a fast lighting rig. 3Delight can extract sharp shadows using this shader so that no directional light is needed to cast shadows from the sun.
This shader is based on the Hosek-Wilkie sky model. It is an analytical model of the daytime sky that includes the latest improvement in this field of research. This model is able to properly picture sunsets and lighting in high turbidity environments – such as lighting during a moist day.