Go to the land layer.
With the magic wand, select in the clear area, then CTRL-I to invert the selection.
Go to Adjustments > Gradient Mapping.
The ocean gradient will apply itself to your land. Don't panic. Just right click each slider, select Change Color, and pick a green shade from your palette.
With the ocean, we went ahead and kept white as our brightest color, plus our four blues for a total of five shades. With the ground we're not going to do that; eliminate one of the sliders in the middle, and change the white to your lightest green shade.
As before, move the sliders around to find a color scheme that you like, then click OK.
The Highland layer works exactly the same:
Go to Layer
Select and Invert
Gradient Map
Change the colors to your brown range
Adjust to taste
Click OK
Unhide the texture, set to Overlay.
The Mountain layer is almost the same, but not quite. Instead of using four colors, we're only going to use two or three (your choice). The dark end of the gradient is 50% gray, and the light end is white. If you choose to add a third color, use 25% gray, and move that slider to adjust the look of your peaks. Occasionally, I'll add an additional color and make my bottom 75% gray, followed by 50%, 25%, and white.
How awesome is that?
Stage 4 conclusion
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