Enabling and controlling light shafts
In previous scenes we have already seen the use of Light Shafts (or God Rays) which disperse around objects occluding any light on which rays are enabled. The classic use for light shafts is as a feature of sunlight, but any light can have Light Shafts enabled in its properties, and this can be used to create a 'beams through fog' effect without really doing anything more than turn them on for a given light. There are a few properties worth exploring, to tune the look of light shafts when they're used.
The given screenshot shows a sequence from an animated light casting light shafts around a 'sun' mesh, which is just an Emissive sphere. The example comes from our online bonus recipe (PDF), that supplements the book Creating an animated day to night transition and can be found at http://www.packtpub.com/sites/default/files/downloads/1802EXP Unreal Development Kit Game Design Cookbook_Bonus Recipes.PDF.
For the current scene, which you may wish to do first...
