Ummmmm, thats the jpeg....
The PNG uncompressed was 10MB, the image attached is 3.7 MB. I gave it to him with as little compression as possiable just to see the quality of it. You could probably reduce it to under 2 MB while still keeping a reasonable quality level but this was just a test.
May I remind you lot that he did not take the image, I did as a test to show how a real terrain image could look. I choose to use his terrain for the test as there simply was no one with ready made terrain available. The results are clear, not only is mine more detailed, but the textures are less blury and you could downsize it to half the resolution for super sampled AA if the image is too big.
To me the terrain looks pretty good, have no clue WTF most of you are on about the waterfall.
Anyway, if you think you have a terrain more worthy of HD, then feel free to contact me and I am more than willing to take the screenshot for you.