Take the two files below, render each of them and use the imagemap file as pigment for a height field.
--> Not very artistic but you-can-get-the-idea code follows. <--
****** hf.pov
//Height Field
camera { location <0, 0, -2> }
plane { z, 0
finish { ambient 1 }
pigment { bozo pigment_map{
[0.2 rgb 0] //water
level
[1 rgb 1]}
//Hills
}}
******* im.pov
//Image Map
camera { location <0, 0, -2> }
plane { z, 0
finish { ambient 1 }
pigment { bozo pigment_map{
[0.2 rgb <0,0,1>]
//water level
[0.2 bozo
scale 0.2
color_map{ [0 rgb<0,1,0>]
[1 rgb<0.5,0.5,0.25>]
}
]} //Hills
}}
******* stick this in your "real" pov file
height_field
{
tga "hf.tga"
texture
{
pigment
{
image_map { tga "im.tga" map_type
0 interpolate 2 once }
rotate x*90
}
}
scale <5,2,5>
}