OOE, map looks good but spend a little more time on the paint job (same goes to all you modders out there)
When painting the terrain take your time, this is what will make your map look professional, at the moment the terrain looks like you just slapped the colors on with no attention to detail. The textures are like painted lines and do not blend together. Dont just use the hard brush to paint the terrain, use the soft brush as well. By using the soft brush and going over it 3-4 times you can blend two textures together to make a smooth transition between the textures, blending takes time but its worth it so it has a realism in the look of the map. Look at Roo's maps he is a blending genius, see how the textures flow together you cannot see where one ends and the other starts. To me this is one of the most important parts of making a map, its all in the paint job.
When blending use a soft round brush (soft is the only brush to use for blending) and try different brush sizes and paint over the textures to blend them together, you can even use just the single dot brush to paint small areas for added detail if needed. This way you will be able to get the effect you want.
As an example here is screenie from my Pilferers Park map, the paint job came out fantastic after blending the textures together especially the cracks in the dirt (blended in using soft single dot brush). These cracks are blended into the brown dirt texture - they are not part of the same terrain jpeg - its actually 2 different textures blended together.
I discussed blending with Fèáthèrs McGráw and he really picked up what I was saying, look how he blended the terrain textures together for the maps he made for King of the Hill - really good paint jobs on both maps