I think you should have said the map wasn't made by you, but was a quick and dirty port of
PRO42-The Bereaver-.
The gun emplacment looks very pretty in the 2D of TotalA. But they look absolutely horrible in 3D. And you haven't made any effort to fix them. Basically it's a 5mins job, you exported heightmap and colormap, resized heighmap, ran mapconv, and added an uglyly colored .smd. When will people realise it takes much more than that to get a good result? Can you SEE how horrible those gun cannon look in Spring 3D? They only work when seen from top, any tilt and the illusion is broken. Well, however, you managed to get the heightmap line up quite well, so points for that. Still, one can clearly see the heightmap wasn't made to be viewed in full 3D. Ponds are like painted. Cliffs edges are ultra smooth. Etc...
Just one thing intrigue me. There's no tree on that map. Do you have notree mapconv for the new format, or have u used some hue shifting technique? (which would explain the horrible purplish color)