Biome specific map previews for Mainland, which for some reason is still the favorite map of many lobby players, refs #4962.

This was SVN commit r21679.

binaries/data/mods/public/gui/gamesetup/gamesetup.js

@@ -1632,9 +1632,12 @@ function getMapDisplayName(map)
 
 function getMapPreview(map)
 {
-	let mapBiome = g_Settings.Biomes.find(biome => biome.Id == g_GameAttributes.settings.Biome);
-	if (mapBiome && mapBiome.Preview)
-		return mapBiome.Preview;
+	if (g_GameAttributes.settings.Biome)
+	{
+		let biomePreview = basename(map) + "_" + basename(g_GameAttributes.settings.Biome) + ".png";
+		if (Engine.FileExists("art/textures/ui/session/icons/mappreview/" + biomePreview))
+			return biomePreview;
+	}
 
 	let mapData = loadMapData(map);
 	if (!mapData || !mapData.settings || !mapData.settings.Preview)

binaries/data/mods/public/maps/random/mainland.json

@@ -3,7 +3,7 @@
 		"Name" : "Mainland",
 		"Script" : "mainland.js",
 		"Description" : "A typical map without any water.",
-		"Preview" : "mainland.png",
+		"Preview" : "mainland_temperate.png",
 		"SupportedBiomes": "generic/",
 		"CircularMap" : true
 	}

binaries/data/mods/public/maps/random/rmbiome/fields_of_meroe/dry.json

@@ -1,8 +1,7 @@
 {
 	"Description": {
 		"Title": "Dry Season",
-		"Description": "The vitalizing waters of the Nile sustain life along its banks, while the long dry season scorches the land.",
-		"Preview" : "fields_of_meroe_dry.png"
+		"Description": "The vitalizing waters of the Nile sustain life along its banks, while the long dry season scorches the land."
 	},
 	"Environment": {
 		"SkySet": "sunny",

binaries/data/mods/public/maps/random/rmbiome/fields_of_meroe/rainy.json

@@ -1,8 +1,7 @@
 {
 	"Description": {
 		"Title": "Rainy Season",
-		"Description": "Revelling in the much awaited rain, the baked land transforms into a lush haven for both man and beast.",
-		"Preview" : "fields_of_meroe_rainy.png"
+		"Description": "Revelling in the much awaited rain, the baked land transforms into a lush haven for both man and beast."
 	},
 	"Environment": {
 		"SkySet": "stormy",

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

@@ -1,8 +1,7 @@
 {
 	"Description": {
 		"Title": "Frozen Lake",
-		"Description": "Solidifying it's grip, the harsh cold has succeeded in freezing up the gulf. The thick ice formed is capable of withstanding any weight.",
-		"Preview" : "gulf_of_bothnia_frozen_lake.png"
+		"Description": "Solidifying it's grip, the harsh cold has succeeded in freezing up the gulf. The thick ice formed is capable of withstanding any weight."
 	},
 	"Environment": {
 		"SkySet": "stormy",

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

@@ -1,8 +1,7 @@
 {
 	"Description": {
 		"Title": "Late Spring",
-		"Description": "A late spring breeze ripples through the conifer forests of the Gulf of Bothnia. Herds of deer dot the landscape and playful rabbits frolick in the undergrowth.",
-		"Preview" : "gulf_of_bothnia_late_spring.png"
+		"Description": "A late spring breeze ripples through the conifer forests of the Gulf of Bothnia. Herds of deer dot the landscape and playful rabbits frolick in the undergrowth."
 	},
 	"Environment": {
 		"SkySet": "stormy",

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

@@ -1,8 +1,7 @@
 {
 	"Description": {
 		"Title": "Winter",
-		"Description": "Winter has set in, carpeting the land with its first snow. The still unfrozen gulf offers great fishing opportunities.",
-		"Preview" : "gulf_of_bothnia_winter.png"
+		"Description": "Winter has set in, carpeting the land with its first snow. The still unfrozen gulf offers great fishing opportunities."
 	},
 	"Environment": {
 		"SkySet": "stormy",