Any chance you can post a pic or email it to me so I can see what to shoot for?
Tomorrow - check the other thread :)
What would be cool...is to have a night earth texture and a day earth texture and show the night texture on the left side and day on the right with vertex alpha blending them where they meet.
Yup - I did that... not using VA, but the end result was the same. Hit a snag when I tried to optimize it but got later much simpler idea how NOT to show "cities-at-night" lights on the bright/day side of the planet.