Graphics Reference
In-Depth Information
One advantage Lamps have over mesh-lights is that they can be made unidirectional easily,
that is, apart from Point lamps, they cast light in only one direction. The following screenshot
shows the casting of light with a Spot Lamp:
A Spot Lamp allows light to point in just one direction
In the preceding screenshot, you can see that only the Plane and the Spheroid in front of the
Spot lamp receive light. With a mesh-light plane replacing the Spot lamp, objects in both the
front and the back (the half-cylindrical Wall and the second Spheroid) receive light.
A mesh-light emitter illuminates the region backward and forward by default
