diff --git a/desktop_version/src/Graphics.cpp b/desktop_version/src/Graphics.cpp
index b1eee6da..f1a53382 100644
--- a/desktop_version/src/Graphics.cpp
+++ b/desktop_version/src/Graphics.cpp
@@ -640,7 +640,7 @@ void Graphics::drawtile( int x, int y, int t )
     SDL_Rect rect = { Sint16(x), Sint16(y), tiles_rect.w, tiles_rect.h };
 
 #if !defined(NO_CUSTOM_LEVELS)
-    if (t >= 14 && t <= 17 && !FILESYSTEM_assetsmounted)
+    if (t >= 14 && t <= 17 && (!FILESYSTEM_assetsmounted || ed.onewaycol_override))
     {
         colourTransform thect = {ed.getonewaycol()};
         BlitSurfaceTinted(tiles[t], NULL, backBuffer, &rect, thect);
@@ -663,7 +663,7 @@ void Graphics::drawtile2( int x, int y, int t )
     SDL_Rect rect = { Sint16(x), Sint16(y), tiles_rect.w, tiles_rect.h };
 
 #if !defined(NO_CUSTOM_LEVELS)
-    if (t >= 14 && t <= 17 && !FILESYSTEM_assetsmounted)
+    if (t >= 14 && t <= 17 && (!FILESYSTEM_assetsmounted || ed.onewaycol_override))
     {
         colourTransform thect = {ed.getonewaycol()};
         BlitSurfaceTinted(tiles2[t], NULL, backBuffer, &rect, thect);
@@ -3119,7 +3119,7 @@ void Graphics::drawforetile(int x, int y, int t)
 	setRect(rect, x,y,tiles_rect.w, tiles_rect.h);
 
 #if !defined(NO_CUSTOM_LEVELS)
-	if (t >= 14 && t <= 17 && !FILESYSTEM_assetsmounted)
+	if (t >= 14 && t <= 17 && (!FILESYSTEM_assetsmounted || ed.onewaycol_override))
 	{
 		colourTransform thect = {ed.getonewaycol()};
 		BlitSurfaceTinted(tiles[t], NULL, foregroundBuffer, &rect, thect);
@@ -3142,7 +3142,7 @@ void Graphics::drawforetile2(int x, int y, int t)
 	setRect(rect, x,y,tiles_rect.w, tiles_rect.h);
 
 #if !defined(NO_CUSTOM_LEVELS)
-	if (t >= 14 && t <= 17 && !FILESYSTEM_assetsmounted)
+	if (t >= 14 && t <= 17 && (!FILESYSTEM_assetsmounted || ed.onewaycol_override))
 	{
 		colourTransform thect = {ed.getonewaycol()};
 		BlitSurfaceTinted(tiles2[t], NULL, foregroundBuffer, &rect, thect);
diff --git a/desktop_version/src/editor.cpp b/desktop_version/src/editor.cpp
index 0b7e0e9b..ba8435bd 100644
--- a/desktop_version/src/editor.cpp
+++ b/desktop_version/src/editor.cpp
@@ -398,6 +398,8 @@ void editorclass::reset()
 
     ghosts.clear();
     currentghosts = 0;
+
+    onewaycol_override = false;
 }
 
 void editorclass::gethooks()
@@ -1708,6 +1710,11 @@ bool editorclass::load(std::string& _path)
                 {
                     website = pText;
                 }
+
+                if(pKey == "onewaycol_override")
+                {
+                    onewaycol_override = atoi(pText);
+                }
             }
         }
 
@@ -1993,6 +2000,13 @@ bool editorclass::save(std::string& _path)
     meta->LinkEndChild( doc.NewText( website.c_str() ));
     msg->LinkEndChild( meta );
 
+    if (onewaycol_override)
+    {
+        meta = doc.NewElement( "onewaycol_override" );
+        meta->LinkEndChild( doc.NewText( help.String(onewaycol_override).c_str() ));
+        msg->LinkEndChild( meta );
+    }
+
     data->LinkEndChild( msg );
 
     msg = doc.NewElement( "mapwidth" );
diff --git a/desktop_version/src/editor.h b/desktop_version/src/editor.h
index 9237693b..75d6fe7d 100644
--- a/desktop_version/src/editor.h
+++ b/desktop_version/src/editor.h
@@ -241,6 +241,7 @@ class editorclass{
 
   Uint32 getonewaycol(const int rx, const int ry);
   Uint32 getonewaycol();
+  bool onewaycol_override;
 
   int returneditoralpha;
   int oldreturneditoralpha;