looong time no centuring on my part. thanks for summertime comments, amigos 
here is the 1st done in 2004:
[img]http://www2.zbrushcentral.com/uploaded_from_zbc/200401/user_image-1074273121ete.jpg[/img]
for some reason it looks different (and worse) three times: best in zbrush, then photoshop and then viewed with browser, so i hope what you get isnt too awful.
steps:
i created a doublesized standard canvas and sprayed a green and (almost) white texture (forgot to do it tileable).
i loaded a 3d-plane initialized to 16 by 16 to add very basic lowpoly mountains and valleys in edit-move-mode.
keeping the low poly planes approximate shape in mind i cleared the canvas and started to create an alpha with alpha brush using paintstrokes plus spraystrokes, making use of a customized alpha (nada special) for the latter and grabbed it (still doublestandard canvas)…
… then applied it to the lowpoly plane after dividing this about 5 times, then z-offsetting it the usual way.
i applied the greenwhite texture to the plane, rotated and fiddled with repeat h+v settings until i kind of liked what i saw, went into gyromode, rotated/sized the terrain into place and started snapshotting+placing copies into the background by moving the cursor downwards out of the gyro while in move or rotate mode.
on another layer i created another plane for the water with a gelshader and added ripples the deeveeway. at first i went for transparency so i increased the transparency and did a best render with flatten layers off.
i exported the result and loaded the flat image into a new document and following a tip given by Pixolator elsewhere (not his fault that the final result isnt looking that good - it looked very nice at one point but i spoiled it later on :)), i duplicated the layer and flipped it. with cloner-brush in layers mode at reduced rgb-settings and zadd-off i did reflections, followed by smudging and lots of postwork with 2d-brushes.
well, i hope you like it despite of the awful composition and that you might find one of the tips useful for projects of your own 