Continued from here :
http://forums.planetside.co.uk/index.php?topic=10590.msg109533#msg109533This isn't a optimized TGD. I post it as it is.
It could be used as God Rays as a cheat.
Because you don't need any clouds , haze or objects etc in your default Planet.
Or maybe as rays in underwater...
Maybe you could find other ways ... I tried it with a normal light but it was problematic.
Here is the TGD :
Edit : Don't look at the name and think that this Sun is small
As i said this file is as it is. This was part of the other link above.
You can make your Sun and Planet in the size you want of course .