Fixed several problems with the terrain help images,

...adding a couple of new tile icons.

data/core/help.cfg

@@ -439,19 +439,19 @@ Most units have defense of 30 to 40% on grassland."
     [topic]
         id=terrain_forest
         title= _ "Forest"
-        text= "<img>src=terrain/forest/pine-tile.png align=left box=no</img> <img>src=terrain/snow-forest-tile.png align=middle box=no</img> <img>src=terrain/forest/tropical-tile.png align=right box=no</img>
+        text= "<img>src=terrain/forest/pine.png align=left box=no</img> <img>src=terrain/forest/snow-forest.png align=middle box=no</img> <img>src=terrain/forest/tropical.png align=right box=no</img>
 
 " + _ "Forests represent any woodland with significant undergrowth, enough to hinder passage. Though they slow nearly everyone down, forests do offer better defense to most units than open ground. Cavalry, however, have so much trouble navigating them that any benefit gained by stealth is negated. Elves are an exception to this general rule for forests. Not only do they possess full movement in forests, but they also gain a considerable defensive bonus. Dwarves are another exception to this rule; though they are able to plow through the forests without much loss of speed, their utter unfamiliarity with the terrain causes them to receive no defensive bonus.
 
 Most units have 50% defense in forests, but cavalry are limited to 30%. Elves, on the other hand, enjoy 60 to 70% defense, even their mounted units. Dwarves generally receive only 30% defense in forests.
 
-" + "<img>src=terrain/forest/great-tree-tile.png align=middle box=no</img>"
+" + "<img>src=terrain/forest/great-tree1.png align=middle box=no</img>"
     [/topic]
 
     [topic]
         id=terrain_hills
         title= _ "Hills"
-        text= "<img>src=terrain/hills-variation1.png align=left box=no</img> <img>src=terrain/snow-hills.png align=middle box=no</img>
+        text= "<img>src=terrain/hills-variation.png align=left box=no</img> <img>src=terrain/snow-hills.png align=middle box=no</img> <img>src=terrain/desert-hills.png align=right box=no</img>
 
 " + _ "Hills represent any reasonably rough terrain, with enough dips and rises in the ground to provide some cover. Hills are difficult for most troops to navigate. Dwarves, Trolls, and Orcs have enough familiarity with the terrain that they can pass through it without being slowed down. Cavalry have enough trouble navigating the terrain that any defensive aid lent by cover is negated.
 
@@ -559,7 +559,7 @@ Most units receive 20 to 40% defense in Caves, whereas dwarves have 50%."
     [topic]
         id=terrain_rockbound_cave
         title= _ "Rockbound Cave"
-        text= "<img>src=terrain/cave/hills-variation1.png align=left box=no</img>
+        text= "<img>src=terrain/cave/hills-variation.png align=left box=no</img>
 
 " + _ "Rockbound cave terrain is formed by the action of water and wind, carrying erosive particles that carve the rock. It resembles a scraggy underground cavern which reduces efficiency of most units, but shoulders defense. Dwarves and Trolls, who are main settlers of caves, have a relatively easy time navigating this terrain. Dwarves, who by dint of their small size have the full advantage of navigation in such topography. Occasionally caves are <ref>dst='terrain_illuminated_cave' text='Illuminated'</ref>
 
@@ -569,7 +569,7 @@ Most units have about 50% defense in rocky caves, whereas cavalry are limited to
     [topic]
         id=terrain_illuminated_cave
         title= _ "Illuminated Cave"
-        text= "<img>src=terrain/cave/beam-tile.png align=left box=no</img> <img>src=terrain/cave/hills-beam-tile.png align=right box=no</img>
+        text= "<img>src=terrain/cave/beam-cave-tile.png align=left box=no</img> <img>src=terrain/cave/hills-beam-tile.png align=middle box=no</img> <img>src=terrain/forest/mushrooms-beam-tile.png align=right box=no</img>
 
 " + _ "Rare patches of the underground world are illuminated by light from the surface shining down into the gloomy darkness. This provides an attack bonus for lawful units and removes the attack bonus from chaotic units. In all other regards this terrain is functionally identical to normal cave terrains."
     [/topic]
@@ -577,7 +577,7 @@ Most units have about 50% defense in rocky caves, whereas cavalry are limited to
     [topic]
         id=terrain_fungus
         title= _ "Mushroom Grove"
-        text= "<img>src=terrain/mushrooms-tile.png align=left box=no</img>
+        text= "<img>src=terrain/forest/mushrooms-tile.png align=left box=no</img>
 
 " + _ "Mushroom groves are vast underground forests of giant mushrooms, which thrive in the damp darkness. Most units have trouble negotiating the spongy floor of smaller fungi, but they have plenty of cover behind the larger stalks. Mounted units, however, become completely mired and lack proper freedom of movement in combat. Undead units have a natural affinity for decay and function quite well in mushroom forests.
 
@@ -601,7 +601,9 @@ Most units receive 50% to 60% defense in mushroom groves, whereas cavalry receiv
 
 Most units have 50 to 60% defense in villages, whereas cavalry receive only 40%.
 
-" + "<img>src=terrain/village/human-snow-hills-tile.png align=left box=no</img> <img>src=terrain/village/dwarven-tile.png align=middle box=no</img> <img>src=terrain/village/desert-tile.png align=right box=no</img>"
+" + "<img>src=terrain/village/human-snow-hills-tile.png align=left box=no</img> <img>src=terrain/village/dwarven-tile.png align=middle box=no</img> <img>src=terrain/village/desert-tile.png align=right box=no</img>
+
+" + "<img>src=terrain/village/human-city-tile.png align=left box=no</img> <img>src=terrain/village/hut-hills-tile.png align=middle box=no</img> <img>src=terrain/village/cave-tile.png align=right box=no</img>"
     [/topic]
 
     [topic]
@@ -651,7 +653,7 @@ For those who go by land or sea, a bridge is the best of both worlds - for gamep
     [topic]
         id=terrain_cavewall
         title= _ "Cave Wall"
-        text= "<img>src=terrain/cave/wall-rough1.png align=left box=no</img>
+        text= "<img>src=terrain/cave/wall-rough-tile.png align=left box=no</img> <img>src=terrain/walls/wall-stone-tile.png align=right box=no</img>
 
 " + _ "Cave walls are made of solid stone, renowned for its ability to impede even the most determined traveler."
     [/topic]
@@ -659,7 +661,7 @@ For those who go by land or sea, a bridge is the best of both worlds - for gamep
     [topic]
         id=terrain_impassable_mountain
         title= _ "Impassable Mountain"
-        text= "<img>src=terrain/cloud-tile.png align=left box=no</img>
+        text= "<img>src=terrain/cloud-tile.png align=left box=no</img> <img>src=terrain/cloud-desert-tile.png align=right box=no</img>
 
 " + _ "Impassable mountains are so tall and steep that they are constantly wreathed in cloud. To cross such mountains is practically impossible. Even flying creatures cannot navigate the jagged peaks at such rarified heights."
     [/topic]