diff --git a/doomsday/plugins/jdoom/src/d_main.c b/doomsday/plugins/jdoom/src/d_main.c
index 3dbad4fb15..5f464b02f7 100644
--- a/doomsday/plugins/jdoom/src/d_main.c
+++ b/doomsday/plugins/jdoom/src/d_main.c
@@ -562,8 +562,8 @@ void G_PostInit(void)
 
     // Get skill / episode / map from parms.
     gameSkill = startSkill = SM_NOITEMS;
-    startEpisode = 1;
-    startMap = 1;
+    startEpisode = 0;
+    startMap = 0;
     autoStart = false;
 
     // Game mode specific settings.
@@ -595,8 +595,8 @@ void G_PostInit(void)
     p = ArgCheck("-episode");
     if(p && p < myargc - 1)
     {
-        startEpisode = Argv(p + 1)[0] - '0';
-        startMap = 1;
+        startEpisode = Argv(p + 1)[0] - '1';
+        startMap = 0;
         autoStart = true;
     }
 
@@ -617,13 +617,13 @@ void G_PostInit(void)
     {
         if(gameMode == commercial)
         {
-            startMap = atoi(Argv(p + 1));
+            startMap = atoi(Argv(p + 1)) - 1;
             autoStart = true;
         }
         else if(p < myargc - 2)
         {
-            startEpisode = Argv(p + 1)[0] - '0';
-            startMap = Argv(p + 2)[0] - '0';
+            startEpisode = Argv(p + 1)[0] - '1';
+            startMap = Argv(p + 2)[0] - '1';
             autoStart = true;
         }
     }
@@ -651,11 +651,11 @@ void G_PostInit(void)
     if(autoStart)
     {
         if(gameMode == commercial)
-            Con_Message("Warp to Map %d, Skill %d\n", startMap,
+            Con_Message("Warp to Map %d, Skill %d\n", startMap+1,
                         startSkill + 1);
         else
             Con_Message("Warp to Episode %d, Map %d, Skill %d\n",
-                        startEpisode, startMap, startSkill + 1);
+                        startEpisode+1, startMap+1, startSkill + 1);
     }
 
     // Load a saved game?
@@ -671,14 +671,14 @@ void G_PostInit(void)
     if(autoStart || IS_NETGAME)
     {
         if(gameMode == commercial)
-            sprintf(mapStr, "MAP%2.2d", startMap);
+            sprintf(mapStr, "MAP%2.2d", startMap+1);
         else
-            sprintf(mapStr, "E%d%d", startEpisode, startMap);
+            sprintf(mapStr, "E%d%d", startEpisode+1, startMap+1);
 
         if(!W_CheckNumForName(mapStr))
         {
-            startEpisode = 1;
-            startMap = 1;
+            startEpisode = 0;
+            startMap = 0;
         }
     }
 
diff --git a/doomsday/plugins/jdoom64/src/d_main.c b/doomsday/plugins/jdoom64/src/d_main.c
index c7a2de8a09..ece439939f 100644
--- a/doomsday/plugins/jdoom64/src/d_main.c
+++ b/doomsday/plugins/jdoom64/src/d_main.c
@@ -424,8 +424,8 @@ void G_PostInit(void)
 
     // Get skill / episode / map from parms.
     gameSkill = startSkill = SM_NOITEMS;
-    startEpisode = 1;
-    startMap = 1;
+    startEpisode = 0;
+    startMap = 0;
     autoStart = false;
 
     // Game mode specific settings
@@ -464,7 +464,7 @@ void G_PostInit(void)
     p = ArgCheck("-warp");
     if(p && p < myargc - 1)
     {
-        startMap = atoi(Argv(p + 1));
+        startMap = atoi(Argv(p + 1)) - '1';
         autoStart = true;
     }
 
@@ -490,8 +490,8 @@ void G_PostInit(void)
     // Are we autostarting?
     if(autoStart)
     {
-        Con_Message("Warp to Episode %d, Map %d, Skill %d\n", startEpisode,
-                    startMap, startSkill + 1);
+        Con_Message("Warp to Episode %d, Map %d, Skill %d\n", startEpisode+1,
+                    startMap+1, startSkill + 1);
     }
 
     // Load a saved game?
@@ -506,12 +506,12 @@ void G_PostInit(void)
     // Check valid episode and map.
     if((autoStart || IS_NETGAME))
     {
-        sprintf(mapStr, "MAP%2.2d", startMap);
+        sprintf(mapStr, "MAP%2.2d", startMap+1);
 
         if(!W_CheckNumForName(mapStr))
         {
-            startEpisode = 1;
-            startMap = 1;
+            startEpisode = 0;
+            startMap = 0;
         }
     }
 
diff --git a/doomsday/plugins/jheretic/src/h_main.c b/doomsday/plugins/jheretic/src/h_main.c
index 4f8240872b..3fb7883ff7 100644
--- a/doomsday/plugins/jheretic/src/h_main.c
+++ b/doomsday/plugins/jheretic/src/h_main.c
@@ -330,6 +330,7 @@ void G_PreInit(void)
     cfg.moveBlock = false;
     cfg.fallOff = true;
     cfg.fixFloorFire = false;
+    cfg.fixPlaneScrollMaterialsEastOnly = true;
 
     cfg.statusbarOpacity = 1;
     cfg.statusbarCounterAlpha = 1;
@@ -461,8 +462,8 @@ void G_PostInit(void)
 
     // Defaults for skill, episode and map.
     startSkill = SM_MEDIUM;
-    startEpisode = 1;
-    startMap = 1;
+    startEpisode = 0;
+    startMap = 0;
     autoStart = false;
 
     // Game mode specific settings.
@@ -488,16 +489,16 @@ void G_PostInit(void)
     p = ArgCheck("-episode");
     if(p && p < myargc - 1)
     {
-        startEpisode = Argv(p + 1)[0] - '0';
-        startMap = 1;
+        startEpisode = Argv(p + 1)[0] - '1';
+        startMap = 0;
         autoStart = true;
     }
 
     p = ArgCheck("-warp");
     if(p && p < myargc - 2)
     {
-        startEpisode = Argv(p + 1)[0] - '0';
-        startMap = Argv(p + 2)[0] - '0';
+        startEpisode = Argv(p + 1)[0] - '1';
+        startMap = Argv(p + 2)[0] - '1';
         autoStart = true;
     }
 
@@ -527,13 +528,13 @@ void G_PostInit(void)
     p = ArgCheck("-devmap");
     if(p && p < myargc - 2)
     {
-        e = Argv(p + 1)[0];
-        m = Argv(p + 2)[0];
-        sprintf(file, MAPDIR "E%cM%c.wad", e, m);
+        e = Argv(p + 1)[0] - 1;
+        m = Argv(p + 2)[0] - 1;
+        sprintf(file, MAPDIR "E%cM%c.wad", e+1, m+1);
         addFile(file);
-        printf("DEVMAP: Episode %c, Map %c.\n", e, m);
-        startEpisode = e - '0';
-        startMap = m - '0';
+        printf("DEVMAP: Episode %c, Map %c.\n", e+1, m+1);
+        startEpisode = e;
+        startMap = m;
         autoStart = true;
         devMap = true;
     }
@@ -541,8 +542,8 @@ void G_PostInit(void)
     // Are we autostarting?
     if(autoStart)
     {
-        Con_Message("Warp to Episode %d, Map %d, Skill %d\n", startEpisode,
-                    startMap, startSkill + 1);
+        Con_Message("Warp to Episode %d, Map %d, Skill %d\n", startEpisode+1,
+                    startMap+1, startSkill + 1);
     }
 
     // Load a saved game?
@@ -557,12 +558,12 @@ void G_PostInit(void)
     // Check valid episode and map
     if(autoStart || IS_NETGAME && !devMap)
     {
-        sprintf(mapStr, "E%d%d", startEpisode, startMap);
+        sprintf(mapStr, "E%d%d", startEpisode+1, startMap+1);
 
         if(!W_CheckNumForName(mapStr))
         {
-            startEpisode = 1;
-            startMap = 1;
+            startEpisode = 0;
+            startMap = 0;
         }
     }
 
diff --git a/doomsday/plugins/jhexen/src/h2_main.c b/doomsday/plugins/jhexen/src/h2_main.c
index 8c7b800a4a..c9b81a2e64 100644
--- a/doomsday/plugins/jhexen/src/h2_main.c
+++ b/doomsday/plugins/jhexen/src/h2_main.c
@@ -404,9 +404,9 @@ void G_PostInit(void)
     /* None */
 
     // Get skill / episode / map from parms.
-    startEpisode = 1;
+    startEpisode = 0;
     startSkill = SM_MEDIUM;
-    startMap = 1;
+    startMap = 0;
 
     // Game mode specific settings.
     /* None */
@@ -450,20 +450,9 @@ void G_PostInit(void)
     p = ArgCheck("-warp");
     if(p && p < Argc() - 1)
     {
-        int                     map;
-
         warpMap = atoi(Argv(p + 1)) - 1;
-        map = P_TranslateMap(warpMap);
-        if(map == -1)
-        {   // Couldn't find real map number.
-            startMap = 1;
-            Con_Message("-WARP: Invalid map number.\n");
-        }
-        else
-        {   // Found a valid startmap.
-            startMap = map;
-            autoStart = true;
-        }
+        startMap = P_TranslateMap(warpMap);
+        autoStart = true;
     }
     else
     {
@@ -487,12 +476,11 @@ void G_PostInit(void)
     // Check valid episode and map.
     if(autoStart || IS_NETGAME)
     {
-        sprintf(mapStr,"MAP%2.2d", startMap);
+        sprintf(mapStr,"MAP%2.2d", startMap+1);
 
         if(!W_CheckNumForName(mapStr))
         {
-            startEpisode = 1;
-            startMap = 1;
+            startMap = 0;
         }
     }