Game Development Reference
3. Rotaing a direcional light works the same way as rotaing a spot light, but instead
of having a light cone to indicate the direcion, you've got a litle blue arrow.
Skylights are a good way to add a small amount of ambient light to your level. They're also
great during the prototyping phase since they cast light on everything in the scene and they
don't slow down much of your frame rate. Their big disadvantage is that they don't cast
shadows, so even interiors will receive light from a skylight.
1. Let's place one now (same method as the other light types)