@Kaiju Master
I can't upload your image - I just get the endless white circle.
@ChellyK
Your map has a lot of potential, but I think you need to decide which tiles you want to use. For example, you are using 2 very different water tiles; one for the waterfall, stream and lake in the centre and the lake top right, and a different one for other areas of water. The orange long grass tile you are using suggests a much more arid type of terrain than one with all this water and numerous trees. The same goes for the pale yellow grass tile. By the way, these could be much more random in appearance. At the moment they are very regular in shape. Then there is the tile you have chosen for the steps up the central cliff face. It is the tile which looks like the steps have been cut out of a grassy slope - therefore they don't really fit with a sheer cliff face. It is important when planning a large map like this to ensure that there is coherence in terrain features.
Then have a look at the solid block areas of trees. Elsewhere the trees appear a bit random, more natural. What you could do is take out some of the trees in the middle of your solid blocks to create some interior gaps. Where you have a double line of trees (e.g. bottom left) taking out the odd one would also look help. It won't stop the trees acting as blocks to movement (if that is what you want), but will help them to look less rigid.
Personally I don't think that your clouds quite work. You do have choices here, however. If you are happy to use a script, Shaz's Multiple Fog script is excellent for creating moving clouds. If you don't want to use a script, you might consider having a moving picture which uses a fog graphic as its base. These would give a better appearance than your solid shapes.