Ian - I have also played with teragen, and I never achieved results like this. I appluad your efforts. This must have taken some time to produce. The results look realistic, the color choices are excellent. Please do more.
Are you ready to go to heaven?
Ephesians 2: 8 & 9 says, "For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast." Think about it... Why did Jesus have to die on the cross if all it took was good works to get to heaven?