A video showing the Ai LightBlocker in use can be found here.

In the following examples, an Ai LightBlocker is connected to an Ai AreaLight. The translation, rotation, and scale of the light blocker are determined by a simple wireframe shape node. By default, the position of the light blocker will appear at 0,0,0.

 

Geometry Type

Density

Shader

An example scene file can be found here.

Axis

Ramp

Height Edge

Width Edge

Roundness