Map touchup: gulf of bothnia

- Denser forests
- frozen lake biome gets some watery holes in there, just to make it
slightly more mazey.
- Tweak the lighting of the specific biomes to avoid overexposing the
ground textures.

Differential Revision: https://code.wildfiregames.com/D4073
This was SVN commit r25680.

binaries/data/mods/public/maps/random/gulf_of_bothnia.js

@@ -8,7 +8,7 @@ if (g_MapSettings.Biome)
 	setSelectedBiome();
 else
 	// TODO: Replace ugly default for atlas by a dropdown
-	setBiome("gulf_of_bothnia/late_spring");
+	setBiome("gulf_of_bothnia/winter");
 
 const tPrimary = g_Terrains.mainTerrain;
 const tForestFloor = g_Terrains.forestFloor1;
@@ -124,6 +124,19 @@ for (let gulfLake of gulfLakePositions)
 		avoidClasses(clPlayer,scaleByMapSize(20, 28)));
 }
 
+if (currentBiome() === "gulf_of_bothnia/frozen_lake")
+{
+	createAreas(
+		new ChainPlacer(
+			1,
+			4,
+			scaleByMapSize(16, 40),
+			0.3),
+		new ElevationPainter(-2),
+		stayClasses(clWater, 2),
+		scaleByMapSize(10, 40));
+}
+
 paintTerrainBasedOnHeight(heightShore, heightLand, Elevation_ExcludeMin_ExcludeMax, tShore);
 paintTerrainBasedOnHeight(-Infinity, heightShore, Elevation_ExcludeMin_IncludeMax, tWater);
 
@@ -135,11 +148,11 @@ else
 	createMountains(tCliff, avoidClasses(clPlayer, 20, clHill, 15, clWater, 0), clHill, scaleByMapSize(1, 4) * numPlayers);
 
 var [forestTrees, stragglerTrees] = getTreeCounts(500, 3000, 0.7);
-createForests(
- [tPrimary, tForestFloor, tForestFloor, pForest, pForest],
- avoidClasses(clPlayer, 20, clForest, 16, clHill, 0, clWater, 2),
- clForest,
- forestTrees);
+createDefaultForests(
+	[tPrimary, tForestFloor, tForestFloor, pForest, pForest],
+	avoidClasses(clPlayer, 20, clForest, 16, clHill, 0, clWater, 2),
+	clForest,
+	forestTrees);
 
 Engine.SetProgress(60);
 

binaries/data/mods/public/maps/random/rmbiome/gulf_of_bothnia/frozen_lake.json

@@ -5,6 +5,10 @@
 	},
 	"Environment": {
 		"SkySet": "stormy",
+		"SunColor": { "r": 0.85, "g": 0.87, "b": 0.90 },
+		"SunElevation": 0.502494,
+		"SunRotation": -0.626047,
+		"AmbientColor": { "r": 0.194118, "g": 0.292157, "b": 0.394118 },
 		"Water": {
 			"WaterBody": {
 				"Type": "lake",
@@ -61,8 +65,8 @@
 		"bush": { "min": 0, "max": 0 }
 	},
 	"Heights": {
-		"seaGround": 0,
-		"shore": 2,
-		"land": 3
+		"seaGround": 1,
+		"shore": 4,
+		"land": 7
 	}
 }

binaries/data/mods/public/maps/random/rmbiome/gulf_of_bothnia/late_spring.json

@@ -5,6 +5,10 @@
 	},
 	"Environment": {
 		"SkySet": "stormy",
+		"SunColor": { "r": 1.032, "g": 0.99, "b": 0.866 },
+		"SunElevation": 0.846,
+		"SunRotation": -0.488,
+		"AmbientColor": { "r": 0.264706, "g": 0.276471, "b": 0.319608 },
 		"Water": {
 			"WaterBody": {
 				"Type": "lake",

binaries/data/mods/public/maps/random/rmbiome/gulf_of_bothnia/winter.json

@@ -5,6 +5,10 @@
 	},
 	"Environment": {
 		"SkySet": "stormy",
+		"SunColor": { "r": 0.99, "g": 0.98, "b": 0.85 },
+		"SunElevation": 0.846,
+		"SunRotation": -0.488,
+		"AmbientColor": { "r": 0.264706, "g": 0.276471, "b": 0.319608 },
 		"Water": {
 			"WaterBody": {
 				"Type": "lake",