In my previous tutorial "Animated Sky domes", I was advised by neurosys that implementing a sun disc that follows the directional light would make the sky even better. So I wrote a separate tutorial to implement it. In this tutorial I demonstrate how to make a dynamic sun using UDK. The tutorial will cover material setup and material instance customization. Using this method, a Sun disc is automatically generated in the position of the main directional light, and its animatable via matinee.
*UPDATE: Tutorial PDF was updated.
If you where running into problems where the whole sky dome is turning white, here is the fix:
In the sky material, select the 'sphere mask' node and make sure the 'attenuation radius' to '0.02'.
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