diff --git a/source/blood/src/blood.cpp b/source/blood/src/blood.cpp
index b53da7f80..cdc8e29a3 100644
--- a/source/blood/src/blood.cpp
+++ b/source/blood/src/blood.cpp
@@ -462,6 +462,7 @@ void GameInterface::app_init()
 		uint32_t etime = I_msTime();
 		Printf(PRINT_NONOTIFY, "Definitions file \"%s\" loaded in %d ms.\n", defsfile, etime - stime);
 	}
+	TileFiles.SetBackup();
 	powerupInit();
 	Printf(PRINT_NONOTIFY, "Loading cosine table\n");
 	trigInit();
diff --git a/source/core/textures/buildtiles.cpp b/source/core/textures/buildtiles.cpp
index 47e8ab1bd..8a4e4cebd 100644
--- a/source/core/textures/buildtiles.cpp
+++ b/source/core/textures/buildtiles.cpp
@@ -676,6 +676,7 @@ void tileCopy(int tile, int source, int pal, int xoffset, int yoffset, int flags
 // Clear map specific ART
 //
 //==========================================================================
+static FString currentMapArt;
 
 void artClearMapArt(void)
 {
@@ -685,6 +686,7 @@ void artClearMapArt(void)
 		td.picanm = td.picanmbackup;
 	}
 	TileFiles.SetupReverseTileMap();
+	currentMapArt = "";
 }
 
 //==========================================================================
@@ -692,7 +694,6 @@ void artClearMapArt(void)
 // Load map specficied ART
 //
 //==========================================================================
-static FString currentMapArt;
 
 void artSetupMapArt(const char* filename)
 {
diff --git a/source/core/textures/buildtiles.h b/source/core/textures/buildtiles.h
index 454053265..ea9ea72e5 100644
--- a/source/core/textures/buildtiles.h
+++ b/source/core/textures/buildtiles.h
@@ -299,6 +299,15 @@ struct BuildTiles
 		CloseAll();
 	}
 
+	void SetBackup()
+	{
+		for (auto& td : tiledata)
+		{
+			td.backup = td.texture;
+			td.picanmbackup = td.picanm;
+		}
+	}
+
 	void CloseAll();
 
 	void AddTile(int tilenum, FGameTexture* tex, bool permap = false);
diff --git a/source/exhumed/src/exhumed.cpp b/source/exhumed/src/exhumed.cpp
index 18f7dd4f0..363e95890 100644
--- a/source/exhumed/src/exhumed.cpp
+++ b/source/exhumed/src/exhumed.cpp
@@ -633,6 +633,7 @@ void GameInterface::app_init()
         uint32_t etime = I_msTime();
         Printf(PRINT_NONOTIFY, "Definitions file \"%s\" loaded in %d ms.\n", defsfile, etime - stime);
     }
+    TileFiles.SetBackup();
 
     InitView();
     InitFX();
diff --git a/source/games/duke/src/game.cpp b/source/games/duke/src/game.cpp
index ae071be8c..eff1d154d 100644
--- a/source/games/duke/src/game.cpp
+++ b/source/games/duke/src/game.cpp
@@ -243,6 +243,7 @@ static void loaddefs()
 		deftimer.Unclock();
 		Printf(PRINT_NONOTIFY, "Definitions file \"%s\" loaded in %.3f ms.\n", defsfile, deftimer.TimeMS());
 	}
+	TileFiles.SetBackup();
 	userConfig.AddDefs.reset();
 }
 
diff --git a/source/sw/src/game.cpp b/source/sw/src/game.cpp
index c1e9406e5..13299f227 100644
--- a/source/sw/src/game.cpp
+++ b/source/sw/src/game.cpp
@@ -234,7 +234,8 @@ void GameInterface::app_init()
         LoadCustomInfoFromScript("swcustom.txt");   // Load user customisation information
  
     if (!loaddefinitionsfile(G_DefFile())) Printf(PRINT_NONOTIFY, "Definitions file loaded.\n");
-	userConfig.AddDefs.reset();
+    TileFiles.SetBackup();
+    userConfig.AddDefs.reset();
     InitFX();
 }