Well, ive always wanted to make a map for TA with shallow water, abe before now, you had to render any shallow water you wanted in a 3d renderer, pretty much, it wasnt really doable, at least, not easily, and with mapmaking for TA Spring, it is, and its easy, too.
This is far from finished, before I finish it, I need to double the size or so (and I need to reinstall windows to do that, mapconv on wine will not make maps larger than 8 by 8 for me, it seems) and use the original heightmap which was 45 degrees to the current one, and it needs finetuning and such.
Thanks to zswsg for letting me use the SMD details and skypox from CPIA, I modified the SMD details to make the shallow water look better, and will modify them more as I am not quite satisfied with the angle of light.
Still, here is the screenshot:
I will include the heigntmap in SVG format (a vector graphic format, absolutely great for making metal maps) with the finished map, for anyone else who wants to do something with it.