Step 4: The High Ground Layer and the Heightfield
In this step we will create the next level, or higher ground and appy the bump map to it.
Firstly hide the ground layer you just created and select the heightfield as seen in the first screen shot below.
Then choose the "select by color tool" and check the "Feather Edges" box. Move the feather slider to about 30 and the threshold slider to about 90 as shown in the second screenshot. Then choose the lightest point on the heightfield and select by colour as shown in the third screenshot.
Then unhide the light green ground layer. Create a new layer above it and name it "High Ground". Then select the new layer it as shown in the fourth screenshot.
In the map window use the bucket fill tool to fill the selected area with a brown colour representing higher ground. I prefer to use lighter colours as lighter ones show off the bump map more effectively. The result should look something like the fifth screenshot.
The use the same bump mapping technique as in Step 3, applying the bump map to the new "High Ground" layer. This time the elevation is decdreased to
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