couple of questions:

first, I know how to change the angle of the light, but what about direction? I've got a sun in my sky and all the shadows go the wrong direction. can I change which direction they go, or should I just move the sun in my sky?

another thing. I saw a tutorial somewhere on how to add a lens effect to the sun, but I can't find it now. anybody know how to do this? thanks.

figured the first question out, so I'll post it here in case someone ever uses the search function. :p

all you have to do is change out the light_environment for a light_spot and set the "is sky" variable to yes. it works just like a light_environment in that the light comes from the sky texture, but you can set the direction by rotating the "yaw" arrow. you do not need (or want, probably) an info_target.