Use a Gray-Alpha texture for water depth information and use the globe-colors.jpg texture for water color.

Effects/water.eff

@@ -52,13 +52,21 @@
 			<internal-format>normalized</internal-format>
 		</texture>
 		<texture n="7">
-			<image>Textures/Globe/ocean_depth_1.jpg</image>
+			<image>Textures/Globe/ocean_depth_1.png</image>
 			<type>2d</type>
 			<filter>linear-mipmap-linear</filter>
 			<wrap-s>repeat</wrap-s>
 			<wrap-t>repeat</wrap-t>
 			<internal-format>normalized</internal-format>
 		</texture>
+                <texture n="8">
+                        <image>Textures/Globe/globe_colors.jpg</image>
+                        <type>2d</type>
+                        <filter>linear-mipmap-linear</filter>
+                        <wrap-s>repeat</wrap-s>
+                        <wrap-t>repeat</wrap-t>
+                        <internal-format>normalized</internal-format>
+                </texture>
 		<texture n="10">
 			<image>Textures/Terrain/packice-overlay.png</image>
 			<type>2d</type>
@@ -380,6 +388,27 @@
 					<use>texture[10]/internal-format</use>
 				</internal-format>
 			</texture-unit>
+                        <texture-unit>
+                                 <unit>8</unit>
+                                 <image>
+                                 <use>texture[8]/image</use>
+                                </image>
+                                <type>
+                                        <use>texture[8]/type</use>
+                                </type>
+                                <filter>
+                                         <use>texture[8]/filter</use>
+                                </filter>
+                                <wrap-s>
+                                        <use>texture[8]/wrap-s</use>
+                                </wrap-s>
+                                <wrap-t>
+                                        <use>texture[8]/wrap-t</use>
+                                </wrap-t>
+                                <internal-format>
+                                        <use>texture[8]/internal-format</use>
+                                </internal-format>
+                        </texture-unit>
 
 			<program>
 				<vertex-shader>Shaders/water-ALS.vert</vertex-shader>
@@ -425,6 +454,11 @@
 				<type>sampler-2d</type>
 				<value type="int">7</value>
 			</uniform>
+                        <uniform>
+                                <name>water_colormap</name>
+                                <type>sampler-2d</type>
+                                <value type="int">8</value>
+                        </uniform>
             <!-- normalmap is .dds-->
             <uniform>
                 <name>normalmap_dds</name>

Shaders/water-ALS-high.frag

@@ -9,6 +9,7 @@
 #version 120
 
 uniform sampler2D water_normalmap;
+uniform sampler2D water_colormap;
 uniform sampler2D water_dudvmap;
 uniform sampler2D sea_foam;
 uniform sampler2D perlin_normalmap;
@@ -219,12 +220,12 @@ void main(void)
 	float noise_2500m = Noise3D(rawPos.xyz, 2500.0);
 
 	// get depth map
+        vec4 colorTexel = texture2D(water_colormap, TopoUV);
 	vec4 topoTexel = texture2D(topo_map, TopoUV);
-	topoTexel.a = 0.8*topoTexel.r+0.2*topoTexel.g;
-        topoTexel.a = -topoTexel.a*topoTexel.a + 2*topoTexel.a;
+        topoTexel.a = topoTexel.r;
 
 	float floorMixFactor = smoothstep(0.3, 0.985, topoTexel.a);
-	vec3 floorColour = topoTexel.rgb;
+	vec3 floorColour = colorTexel.rgb;
 	
 	mat4 RotationMatrix;