diff --git a/Source/Core/Data/DirectoryReader.cs b/Source/Core/Data/DirectoryReader.cs
index 6183ee40..a79216c1 100755
--- a/Source/Core/Data/DirectoryReader.cs
+++ b/Source/Core/Data/DirectoryReader.cs
@@ -467,12 +467,12 @@ namespace CodeImp.DoomBuilder.Data
 		internal override MemoryStream LoadFile(string filename)
 		{
 			MemoryStream s = null;
-
-			try 
+			string casecorrectfilename = GetCorrectCaseForFile(filename);
+			try
 			{
 				lock(this)
 				{
-					s = new MemoryStream(File.ReadAllBytes(Path.Combine(location.location, filename)));
+					s = new MemoryStream(File.ReadAllBytes(Path.Combine(location.location, casecorrectfilename)));
 				}
 			} 
 			catch(Exception e) 
@@ -514,6 +514,11 @@ namespace CodeImp.DoomBuilder.Data
 			return tempfile;
 		}
 
+		protected override string GetCorrectCaseForFile(string filepathname)
+		{
+			return files.GetFileInfo(filepathname).filepathname;
+		}
+
 		#endregion
 
 		#region ================== Compiling (mxd)
diff --git a/Source/Core/Data/PK3StructuredReader.cs b/Source/Core/Data/PK3StructuredReader.cs
index 0c584725..01cbba9c 100755
--- a/Source/Core/Data/PK3StructuredReader.cs
+++ b/Source/Core/Data/PK3StructuredReader.cs
@@ -501,17 +501,7 @@ namespace CodeImp.DoomBuilder.Data
 			
 			if(filename.IndexOf('.') > -1)
 			{
-				string fullname = Path.Combine(pathname, filename);
-				if(FileExists(fullname)) 
-				{
-					allfilenames = new string[1];
-					allfilenames[0] = Path.Combine(pathname, filename);
-				} 
-				else 
-				{
-					allfilenames = new string[0];
-					General.ErrorLogger.Add(ErrorType.Warning, "Unable to load DECORATE file \"" + fullname + "\"");
-				}
+                allfilenames = GetFileAtPath(filename, pathname, "DECORATE");
 			}
 			else
 				allfilenames = GetAllFilesWithTitle(pathname, filename, false);
@@ -545,17 +535,7 @@ namespace CodeImp.DoomBuilder.Data
 
             if (filename.IndexOf('.') > -1)
             {
-                string fullname = Path.Combine(pathname, filename);
-                if (FileExists(fullname))
-                {
-                    allfilenames = new string[1];
-                    allfilenames[0] = Path.Combine(pathname, filename);
-                }
-                else
-                {
-                    allfilenames = new string[0];
-                    General.ErrorLogger.Add(ErrorType.Warning, "Unable to load ZSCRIPT file \"" + fullname + "\"");
-                }
+                allfilenames = GetFileAtPath(filename, pathname, "ZSCRIPT");
             }
             else
                 allfilenames = GetAllFilesWithTitle(pathname, filename, false);
@@ -589,17 +569,7 @@ namespace CodeImp.DoomBuilder.Data
 
             if (filename.IndexOf('.') > -1)
             {
-                string fullname = Path.Combine(pathname, filename);
-                if (FileExists(fullname))
-                {
-                    allfilenames = new string[1];
-                    allfilenames[0] = Path.Combine(pathname, filename);
-                }
-                else
-                {
-                    allfilenames = new string[0];
-                    General.ErrorLogger.Add(ErrorType.Warning, "Unable to load MODELDEF file \"" + fullname + "\"");
-                }
+                allfilenames = GetFileAtPath(filename, pathname, "MODELDEF");
             }
             else
                 allfilenames = GetAllFilesWithTitle(pathname, filename, false);
@@ -770,7 +740,26 @@ namespace CodeImp.DoomBuilder.Data
 			// Return result
 			return images;
 		}
-		
+
+		protected string[] GetFileAtPath(string filename, string pathname, string type)
+		{
+			string[] allfilenames;
+			string fullname = Path.Combine(pathname, filename);
+			if (FileExists(fullname))
+			{
+				allfilenames = new string[1];
+				allfilenames[0] = Path.Combine(pathname, filename);
+				allfilenames[0] = GetCorrectCaseForFile(allfilenames[0]);
+			}
+			else
+			{
+				allfilenames = new string[0];
+				General.ErrorLogger.Add(ErrorType.Warning, "Unable to load " + type + " file \"" + fullname + "\"");
+			}
+
+			return allfilenames;
+		}
+
 		// This copies images from a collection unless they already exist in the list
 		private static void AddImagesToList(Dictionary<long, ImageData> targetlist, IEnumerable<ImageData> sourcelist)
 		{
@@ -834,6 +823,12 @@ namespace CodeImp.DoomBuilder.Data
 			}
 		}
 
+		// Unix-like systems have case-sensitive filesystems. Use this to correct the case of a filename with the given path.
+		protected virtual string GetCorrectCaseForFile(string filepathname)
+		{
+			return filepathname;
+		}
+
 		//mxd. Archives and Folders don't have lump indices
 		internal override MemoryStream LoadFile(string name, int unused)
 		{
diff --git a/Source/Core/ZDoom/ModeldefStructure.cs b/Source/Core/ZDoom/ModeldefStructure.cs
index 088f9491..3da2e395 100755
--- a/Source/Core/ZDoom/ModeldefStructure.cs
+++ b/Source/Core/ZDoom/ModeldefStructure.cs
@@ -102,7 +102,7 @@ namespace CodeImp.DoomBuilder.ZDoom
 				{
 					case "path":
 						parser.SkipWhitespace(true);
-						path = parser.StripTokenQuotes(parser.ReadToken(false)).Replace("/", "\\"); // Don't skip newline
+						path = parser.StripTokenQuotes(parser.ReadToken(false)).Replace("\\", "/"); // Don't skip newline
 						if(string.IsNullOrEmpty(path))
 						{
 							parser.ReportError("Expected model path");