Feature - Black Ice terrain modification

megamek/i18n/megamek/common/options/messages.properties

@@ -125,6 +125,8 @@ GameOptionsInfo.option.minefields.displayableName=TacOps Minefields / BMM Minefi
 GameOptionsInfo.option.minefields.description=If checked, minefields can be used.\nChecked by default.
 GameOptionsInfo.option.hidden_units.displayableName=Hidden Units
 GameOptionsInfo.option.hidden_units.description=If checked, players may deploy units hidden.
+GameOptionsInfo.option.black_ice.displayableName=Black Ice
+GameOptionsInfo.option.black_ice.description=If checked, Black Ice may form on pavement if temperatures are below -30C. TO:AR p38\nDoes not affect Black Ice forming do to Ice Storms. TO:AR p58
 GameOptionsInfo.option.double_blind.displayableName=TacOps Double blind
 GameOptionsInfo.option.single_blind_bots.displayableName=(Unofficial) Default bots to single blind, when using TacOps Double blind
 GameOptionsInfo.option.double_blind.description=If checked, enemy units will only be visible if they are in line of sight of one or more of your units, or within sensor range. \nUnchecked by default.

megamek/src/megamek/common/Compute.java

@@ -576,6 +576,14 @@ public static boolean isPilotingSkillNeeded(Game game, int entityId,
             return true;
         }
 
+        // Check for black ice on pavement
+        if (destHex.containsTerrain(Terrains.BLACK_ICE)
+                && !(entity.getElevation() > destHex.getLevel())
+                && isPavementStep
+                && (movementType != EntityMovementType.MOVE_JUMP)) {
+            return true;
+        }
+
         // Check for water unless we're a hovercraft or naval or using a bridge
         // or flying or QuadVee in vehicle mode.
         if ((movementType != EntityMovementType.MOVE_JUMP)