Add K_TerrainInit to partload instead, Exitlevel on Terrain definition load to prevent issues

src/k_terrain.c

@@ -2211,10 +2211,11 @@ static boolean K_TERRAINLumpParser(char *data, size_t size)
 
 		See header file for description.
 --------------------------------------------------*/
-void K_InitTerrain(UINT16 wadNum)
+boolean K_InitTerrain(UINT16 wadNum)
 {
 	UINT16 lumpNum;
 	lumpinfo_t *lump_p = wadfiles[wadNum]->lumpinfo;
+	boolean terrainLoaded = false;
 
 	// Iterate through all lumps and compare the name individually.
 	// In PK3 files, you can potentially have multiple TERRAIN differentiated by
@@ -2249,6 +2250,8 @@ void K_InitTerrain(UINT16 wadNum)
 			size = W_LumpLengthPwad(wadNum, lumpNum);
 
 			CONS_Printf(M_GetText("Loading TERRAIN from %s\n"), name);
+			terrainLoaded = true;
+			
 
 			datacopy = (char *)Z_Malloc((size+1)*sizeof(char),PU_STATIC,NULL);
 			memmove(datacopy,data,size);
@@ -2265,4 +2268,7 @@ void K_InitTerrain(UINT16 wadNum)
 	}
 
 	R_ClearTextureNumCache(false);
+
+	return terrainLoaded;
+	
 }

src/k_terrain.h

@@ -571,14 +571,15 @@ void K_UpdateTerrainOverlay(mobj_t *mo);
 
 		Finds the TERRAIN lumps in a WAD/PK3, and
 		processes all of them.
+		Also returns if new terrains were loaded
 
 	Input Arguments:-
 		wadNum - WAD file ID to process.
 
 	Return:-
-		None
+		terrainLoaded - Terrain was loaded
 --------------------------------------------------*/
 
-void K_InitTerrain(UINT16 wadNum);
+boolean K_InitTerrain(UINT16 wadNum);
 
 #endif // __K_TERRAIN_H__

src/p_setup.c

@@ -175,6 +175,7 @@ mapthing_t *redctfstarts[MAXPLAYERS];
 // Might be replacable with parameters, but non-trivial when the functions are called on separate tics
 static SINT8 partadd_stage = -1;
 static boolean partadd_replacescurrentmap = false;
+static boolean partadd_terrainloaded = false;
 static boolean partadd_important = false;
 UINT16 partadd_earliestfile = UINT16_MAX;
 
@@ -8486,7 +8487,11 @@ UINT16 P_PartialAddWadFile(const char *wadfilename)
 
 	// Reload BRIGHT
 	K_InitBrightmapsPwad(wadnum);
-
+	
+	// Reload TERRAIN
+	if (K_InitTerrain(wadnum))
+		partadd_terrainloaded = true;
+		
 	//
 	// look for skins
 	//
@@ -8607,6 +8612,13 @@ boolean P_MultiSetupWadFiles(boolean fullsetup)
 			if (server)
 				SendNetXCmd(XD_EXITLEVEL, NULL, 0);
 		}
+		
+		if (partadd_terrainloaded && gamestate == GS_LEVEL)
+		{
+			CONS_Printf(M_GetText("Terrain Definition reloaded, ending the level to ensure consistency.\n"));
+			if (server)
+				SendNetXCmd(XD_EXITLEVEL, NULL, 0);
+		}
 		partadd_stage = -1;
 	}
 
@@ -8616,6 +8628,7 @@ boolean P_MultiSetupWadFiles(boolean fullsetup)
 	{
 		partadd_important = false;
 		partadd_replacescurrentmap = false;
+		partadd_terrainloaded = false;
 		partadd_earliestfile = UINT16_MAX;
 		return true;
 	}

src/w_wad.c

@@ -872,8 +872,6 @@ UINT16 W_InitFile(const char *filename, boolean mainfile, boolean startup)
 		break;
 	}
 
-	K_InitTerrain(numwadfiles - 1);
-
 	if (refreshdirmenu & REFRESHDIR_GAMEDATA)
 		G_LoadGameData();
 	DEH_UpdateMaxFreeslots();