Ah, when you post - make sure you click the 'Go Advanced' button. Then you can use the attachment manager (the paperclip) to attach larger images.

Looks good. The different colours clearly represent elevations. It would be great to have a legend for those so that we can see how large the hills are in the middle. I'd also lighten and desaturate the sea a little. It's a bit dominant right now. One other thing is that your compass looks to be lit top right, whereas your landmasses are lit top left. It's a small thing but something of a pet niggle.

Otherwise this looks really great. I'm eternally impressed by anyone that uses Wilbur to good effect. Thanks for posting this, and welcome to the guild!