Right.
First things first, shrink that ship. Make it way smaller, so that the stretched textures on your shi(t)p doesn't show, I'd even consider tinting it darker, not necessarily very dark, only a little darker, to make, again, the textures less apparent. Mostly because the textures on that ship is... Well, bad. On that note, I'd advice having a much more deep, dark and gloomy blue fog, and probably a little thinner, with that I mean that you can see further into the distance.
Second thing, I'd advice you to chose your doodads more carefully, the standard wc3 ones doesn't look good, at all. There is a map in this section which will help you on that front, a map specially made for terrainers, with doodads imported and sorted out for your best benefit, called the
UTM. - Be sure to download the "3.0" one.
While yes, perspective is important, I personally don't think its too important for a first terrain, however elevation is really important if you want a good looking seabed, this kind of depends on what kind of ocean floor you do want though, if you're going for the tropical twist, I'd reccomend having some steep valleys filled with corals and stuff, if you're going for a more... Well, standard seafloor, I'd simply reccomend more elevation. With that I mean, hills and valleys, just make it look undersea, basically, try searching up some pictures on google for refrence, if you like.
I'd also suggest not focusing too much on units (fish and sharks) as it is very hard to pull off a good looking terrain including them, and mostly only the best of terrainers can do that, it takes some... Ahh, experience. Honestly, I think you should exclude the units (fish) completely and just focus on making your terrain look natural, with that comes doodad placement. As of right now, your doodads seem to be a little, randomly placed. Be sure to gather up rushes in spots where it seem natural, and have corals and rock formations align propperly.
Lastly, I'd advice dropping back the fog a slight bit, just to be able to have some background, maybe some mountains fading away in the distance, just to give the terrain some depth. Give my advice some thought, will ya?
And good luck improving your terrain, mate
