While it might be true that you can't really see relief from a satellite I have the habit of exaggerating my terrain so as to make things easier to see. Making things easier to see makes it more exciting but, yes, less accurate. The deserts could use some more yellow in the color mix - the end result should be like a light tan. Snow looks good. Rivers look good but many don't seem to go anywhere - they come out of the mountains and stop. As for the oceans, technically you can't see any waves but here we use the exaggeration idea to make things more exciting.