There's a high chance that I'll be getting Terragen 4 soon, but how much of, and what, visual differences are there between the best you can get from the Creative version and the normal/above average of the Professional version? Photos would be highly appreciated. I know that the Professional version has lot more features than the Creative, but how much difference do those actually make, or are they mostly just nitpicking things that provide more detail and more control, more effects you can get, etc.?