Index: binaries/data/mods/public/maps/random/survivalofthefittest.json
===================================================================
--- binaries/data/mods/public/maps/random/survivalofthefittest.json
+++ binaries/data/mods/public/maps/random/survivalofthefittest.json
@@ -4,7 +4,7 @@
 		"Script" : "survivalofthefittest.js",
 		"Description" : "[color=\"red\"]IMPORTANT NOTE: AI PLAYERS DO NOT WORK WITH THIS MAP[/color]\n\nProtect your base against endless waves of enemies. Use your woman citizen to collect the treasures at the center of the map before others do, and try to build your base up. The last player remaining will be the winner!",
 		"Keywords": ["trigger"],
-		"Preview" : "survivalofthefittest.png",
+		"Preview" : "survival_of_the_fittest.png",
 		"SupportedBiomes": "generic/",
 		"CircularMap" : true,
 		"TriggerScripts": [
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Britons.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Britons.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Britons.xml
@@ -145,7 +145,7 @@
       "Team": -1
     }
   ],
-  "Preview": "sandbox-thebritons.png",
+  "Preview": "sandbox_britons.png",
   "RevealMap": false,
   "VictoryConditions": []
 }
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Carthaginians.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Carthaginians.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Carthaginians.xml
@@ -79,7 +79,7 @@
       "Team": -1
     }
   ],
-  "Preview": "Sandbox - Carthaginians.png",
+  "Preview": "sandbox_carthaginians.png",
   "RevealMap": false,
   "VictoryConditions": []
 }
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Gauls.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Gauls.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Gauls.xml
@@ -147,7 +147,7 @@
       "Team": -1
     }
   ],
-  "Preview": "sandbox-thegauls.png",
+  "Preview": "sandbox_gauls.png",
   "RevealMap": false,
   "VictoryConditions": []
 }
@@ -22654,4 +22654,4 @@
 		</Entity>
 	</Entities>
 	<Paths/>
-</Scenario>
\ No newline at end of file
+</Scenario>
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Iberians.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Iberians.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Iberians.xml
@@ -78,7 +78,7 @@
       "Team": -1
     }
   ],
-  "Preview": "Sandbox - Iberians.png",
+  "Preview": "sandbox_iberians.png",
   "Size": 192,
   "VictoryConditions": []
 }
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Macedonians.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Macedonians.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Macedonians.xml
@@ -97,7 +97,7 @@
       "Team": -1
     }
   ],
-  "Preview": "sandbox-themacks.png",
+  "Preview": "sandbox_macedonians.png",
   "RevealMap": true,
   "VictoryConditions": [
     "conquest"
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Mauryas.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Mauryas.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Mauryas.xml
@@ -40,7 +40,7 @@
 {
   "CircularMap": true,
   "Description": "Mauryan Indian faction showcase map.",
-  "Preview": "sandbox-themauryas.png",
+  "Preview": "sandbox_mauryas.png",
   "Keywords": [
     "demo"
   ],
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Persians.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Persians.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Persians.xml
@@ -40,7 +40,7 @@
 {
   "CircularMap": true,
   "Description": "Demo Map. Play with the Persian civilisation in a sandbox setting.",
-  "Preview": "sandbox-thepersians.png",
+  "Preview": "sandbox_persians.png",
   "Keywords": [
     "demo"
   ],
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Romans.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Romans.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Romans.xml
@@ -87,7 +87,7 @@
       "Team": -1
     }
   ],
-  "Preview": "sandbox-theromans.png",
+  "Preview": "sandbox_romans.png",
   "RevealMap": false,
   "Script": "oasis.js",
   "Size": 256,
Index: binaries/data/mods/public/maps/scenarios/Sandbox - Seleucids.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Sandbox - Seleucids.xml
+++ binaries/data/mods/public/maps/scenarios/Sandbox - Seleucids.xml
@@ -87,7 +87,7 @@
       "Team": -1
     }
   ],
-  "Preview": "sandbox-theseleucids.png",
+  "Preview": "sandbox_seleucids.png",
   "RevealMap": false,
   "Script": "oasis.js",
   "Size": 256,
Index: binaries/data/mods/public/maps/scenarios/The Persian Gates.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/The Persian Gates.xml
+++ binaries/data/mods/public/maps/scenarios/The Persian Gates.xml
@@ -75,7 +75,7 @@
       "Team": 1
     }
   ],
-  "Preview": "The Persian Gates.png",
+  "Preview": "persian_gates.png",
   "RevealMap": false,
   "VictoryConditions": [
     "conquest"
Index: binaries/data/mods/public/maps/scenarios/Tropical Island.xml
===================================================================
--- binaries/data/mods/public/maps/scenarios/Tropical Island.xml
+++ binaries/data/mods/public/maps/scenarios/Tropical Island.xml
@@ -68,7 +68,7 @@
       "Team": 1
     }
   ],
-  "Preview": "Tropical Island.png",
+  "Preview": "tropical_island.png",
   "VictoryConditions": [
     "conquest"
   ]
Index: binaries/data/mods/public/maps/skirmishes/Barcania (3).xml
===================================================================
--- binaries/data/mods/public/maps/skirmishes/Barcania (3).xml
+++ binaries/data/mods/public/maps/skirmishes/Barcania (3).xml
@@ -42,7 +42,7 @@
 		"Name":"Player 3"
     }
   ],
-  "Preview": "Barcania (3).png",
+  "Preview": "barcania.png",
   "CircularMap": true,
   "VictoryConditions": [
     "conquest"
Index: binaries/data/mods/public/maps/tutorials/Introductory_Tutorial.xml
===================================================================
--- binaries/data/mods/public/maps/tutorials/Introductory_Tutorial.xml
+++ binaries/data/mods/public/maps/tutorials/Introductory_Tutorial.xml
@@ -79,7 +79,7 @@
       "Team": -1
     }
   ],
-  "Preview": "Introductory_Tutorial.png",
+  "Preview": "introductory_tutorial.png",
   "RevealMap": false,
   "TriggerScripts": [
     "scripts/TriggerHelper.js",