Light functions

- [Voiceover] Let's move on to light functions.…Lights can be customized further with light functions.…They're essentially materials that control…the light intensity.…If I go back into the courtyard area,…and create a point light,…and go to lit mode, increase the intensity…just a little bit.…I'm now going to go to light function.…

By default there is no light function.…You're gonna see none, so what we're gonna do…is go to materials in the content browser,…right-click and create a material.…I'm gonna call it lightmat, and then I'm gonna…drag that lightmat over to the light function…material parameter for the light.…Then I'm gonna double-click on the gray ball,…and it's gonna open the material editor.…

The first thing I need to do…is select the root node if it's not already selected,…and go over to material domain,…and change that from surface to light function.…Now you'll notice that the only input parameter…is emissive color.…If I right-click and…ask for a Constant3Vector,…and plug that into the emissive color,…and give it something like a .65 value,…