diff --git a/src/ide/Xcode/STK_XCode.xcodeproj/project.pbxproj b/src/ide/Xcode/STK_XCode.xcodeproj/project.pbxproj
index 933b4ab3e..2296e2973 100644
--- a/src/ide/Xcode/STK_XCode.xcodeproj/project.pbxproj
+++ b/src/ide/Xcode/STK_XCode.xcodeproj/project.pbxproj
@@ -34,6 +34,8 @@
 		9522900D0EC4E1D80090E50F /* player_kart.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 95228FFF0EC4E1D80090E50F /* player_kart.hpp */; };
 		957F71270ECE6BBA007C99DE /* plunger.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 957F71250ECE6BB9007C99DE /* plunger.cpp */; };
 		957F71280ECE6BBA007C99DE /* plunger.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 957F71260ECE6BBA007C99DE /* plunger.hpp */; };
+		9588B35D0EE441B80007A94F /* nitro.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 9588B3590EE441B80007A94F /* nitro.cpp */; };
+		9588B35E0EE441B80007A94F /* skid_mark.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 9588B35B0EE441B80007A94F /* skid_mark.cpp */; };
 		958EEFB60EB93C03005F6F70 /* item_info.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 958EEFB50EB93C03005F6F70 /* item_info.hpp */; };
 		958EF0130EB94819005F6F70 /* powerup_manager.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 958EF00F0EB94818005F6F70 /* powerup_manager.cpp */; };
 		958EF0140EB94819005F6F70 /* powerup_manager.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 958EF0100EB94819005F6F70 /* powerup_manager.hpp */; };
@@ -499,8 +501,6 @@
 		95B0D3D30EB69DE0001A0D06 /* sdldrv.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 95B0CEA60EB69DDA001A0D06 /* sdldrv.hpp */; };
 		95B0D3D40EB69DE0001A0D06 /* shadow.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 95B0CEA70EB69DDA001A0D06 /* shadow.cpp */; };
 		95B0D3D50EB69DE0001A0D06 /* shadow.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 95B0CEA80EB69DDA001A0D06 /* shadow.hpp */; };
-		95B0D3D60EB69DE0001A0D06 /* skid_mark.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 95B0CEA90EB69DDA001A0D06 /* skid_mark.cpp */; };
-		95B0D3D70EB69DE0001A0D06 /* skid_mark.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 95B0CEAA0EB69DDA001A0D06 /* skid_mark.hpp */; };
 		95B0D3D90EB69DE0001A0D06 /* smoke.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 95B0CEAC0EB69DDA001A0D06 /* smoke.cpp */; };
 		95B0D3DA0EB69DE0001A0D06 /* smoke.hpp in CopyFiles */ = {isa = PBXBuildFile; fileRef = 95B0CEAD0EB69DDA001A0D06 /* smoke.hpp */; };
 		95B0D3DB0EB69DE0001A0D06 /* static_ssg.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 95B0CEAE0EB69DDA001A0D06 /* static_ssg.cpp */; };
@@ -807,7 +807,6 @@
 				95B0D3D10EB69DE0001A0D06 /* scene.hpp in CopyFiles */,
 				95B0D3D30EB69DE0001A0D06 /* sdldrv.hpp in CopyFiles */,
 				95B0D3D50EB69DE0001A0D06 /* shadow.hpp in CopyFiles */,
-				95B0D3D70EB69DE0001A0D06 /* skid_mark.hpp in CopyFiles */,
 				95B0D3DA0EB69DE0001A0D06 /* smoke.hpp in CopyFiles */,
 				95B0D3DC0EB69DE0001A0D06 /* static_ssg.hpp in CopyFiles */,
 				95B0D3DE0EB69DE0001A0D06 /* stk_config.hpp in CopyFiles */,
@@ -874,6 +873,10 @@
 		95228FFF0EC4E1D80090E50F /* player_kart.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; name = player_kart.hpp; path = ../../karts/player_kart.hpp; sourceTree = SOURCE_ROOT; };
 		957F71250ECE6BB9007C99DE /* plunger.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; path = plunger.cpp; sourceTree = "<group>"; };
 		957F71260ECE6BBA007C99DE /* plunger.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; path = plunger.hpp; sourceTree = "<group>"; };
+		9588B3590EE441B80007A94F /* nitro.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = nitro.cpp; path = games/supertuxkart/src/graphics/nitro.cpp; sourceTree = SYSTEM_DEVELOPER_DIR; };
+		9588B35A0EE441B80007A94F /* nitro.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = nitro.hpp; path = games/supertuxkart/src/graphics/nitro.hpp; sourceTree = SYSTEM_DEVELOPER_DIR; };
+		9588B35B0EE441B80007A94F /* skid_mark.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = skid_mark.cpp; path = games/supertuxkart/src/graphics/skid_mark.cpp; sourceTree = SYSTEM_DEVELOPER_DIR; };
+		9588B35C0EE441B80007A94F /* skid_mark.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = skid_mark.hpp; path = games/supertuxkart/src/graphics/skid_mark.hpp; sourceTree = SYSTEM_DEVELOPER_DIR; };
 		958EEFB50EB93C03005F6F70 /* item_info.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; name = item_info.hpp; path = ../../network/item_info.hpp; sourceTree = SOURCE_ROOT; };
 		958EF00F0EB94818005F6F70 /* powerup_manager.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = powerup_manager.cpp; path = ../../items/powerup_manager.cpp; sourceTree = SOURCE_ROOT; };
 		958EF0100EB94819005F6F70 /* powerup_manager.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; name = powerup_manager.hpp; path = ../../items/powerup_manager.hpp; sourceTree = SOURCE_ROOT; };
@@ -1341,8 +1344,6 @@
 		95B0CEA60EB69DDA001A0D06 /* sdldrv.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; name = sdldrv.hpp; path = ../../sdldrv.hpp; sourceTree = SOURCE_ROOT; };
 		95B0CEA70EB69DDA001A0D06 /* shadow.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = shadow.cpp; path = ../../shadow.cpp; sourceTree = SOURCE_ROOT; };
 		95B0CEA80EB69DDA001A0D06 /* shadow.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; name = shadow.hpp; path = ../../shadow.hpp; sourceTree = SOURCE_ROOT; };
-		95B0CEA90EB69DDA001A0D06 /* skid_mark.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = skid_mark.cpp; path = ../../skid_mark.cpp; sourceTree = SOURCE_ROOT; };
-		95B0CEAA0EB69DDA001A0D06 /* skid_mark.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; name = skid_mark.hpp; path = ../../skid_mark.hpp; sourceTree = SOURCE_ROOT; };
 		95B0CEAC0EB69DDA001A0D06 /* smoke.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = smoke.cpp; path = ../../smoke.cpp; sourceTree = SOURCE_ROOT; };
 		95B0CEAD0EB69DDA001A0D06 /* smoke.hpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.h; name = smoke.hpp; path = ../../smoke.hpp; sourceTree = SOURCE_ROOT; };
 		95B0CEAE0EB69DDA001A0D06 /* static_ssg.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = static_ssg.cpp; path = ../../static_ssg.cpp; sourceTree = SOURCE_ROOT; };
@@ -1682,6 +1683,18 @@
 			path = karts;
 			sourceTree = "<group>";
 		};
+		9588B3580EE441B80007A94F /* graphics */ = {
+			isa = PBXGroup;
+			children = (
+				9588B3590EE441B80007A94F /* nitro.cpp */,
+				9588B35A0EE441B80007A94F /* nitro.hpp */,
+				9588B35B0EE441B80007A94F /* skid_mark.cpp */,
+				9588B35C0EE441B80007A94F /* skid_mark.hpp */,
+			);
+			name = graphics;
+			path = games/supertuxkart/src/graphics;
+			sourceTree = SYSTEM_DEVELOPER_DIR;
+		};
 		95B0C9730EB69DCD001A0D06 /* src */ = {
 			isa = PBXGroup;
 			children = (
@@ -1689,6 +1702,7 @@
 				95B0C9EB0EB69DCE001A0D06 /* audio */,
 				95B0CBE70EB69DD2001A0D06 /* challenges */,
 				95B0CBEF0EB69DD2001A0D06 /* enet */,
+				9588B3580EE441B80007A94F /* graphics */,
 				95B0CC360EB69DD2001A0D06 /* gui */,
 				95B0CE260EB69DD9001A0D06 /* items */,
 				95228FF10EC4E1D80090E50F /* karts */,
@@ -1760,8 +1774,6 @@
 				95B0CEA60EB69DDA001A0D06 /* sdldrv.hpp */,
 				95B0CEA70EB69DDA001A0D06 /* shadow.cpp */,
 				95B0CEA80EB69DDA001A0D06 /* shadow.hpp */,
-				95B0CEA90EB69DDA001A0D06 /* skid_mark.cpp */,
-				95B0CEAA0EB69DDA001A0D06 /* skid_mark.hpp */,
 				95B0CEAC0EB69DDA001A0D06 /* smoke.cpp */,
 				95B0CEAD0EB69DDA001A0D06 /* smoke.hpp */,
 				95B0CEAE0EB69DDA001A0D06 /* static_ssg.cpp */,
@@ -3015,7 +3027,6 @@
 				95B0D3D00EB69DE0001A0D06 /* scene.cpp in Sources */,
 				95B0D3D20EB69DE0001A0D06 /* sdldrv.cpp in Sources */,
 				95B0D3D40EB69DE0001A0D06 /* shadow.cpp in Sources */,
-				95B0D3D60EB69DE0001A0D06 /* skid_mark.cpp in Sources */,
 				95B0D3D90EB69DE0001A0D06 /* smoke.cpp in Sources */,
 				95B0D3DB0EB69DE0001A0D06 /* static_ssg.cpp in Sources */,
 				95B0D3DD0EB69DE0001A0D06 /* stk_config.cpp in Sources */,
@@ -3045,6 +3056,8 @@
 				9522900C0EC4E1D80090E50F /* player_kart.cpp in Sources */,
 				957F71270ECE6BBA007C99DE /* plunger.cpp in Sources */,
 				95C239160EE0C41C00F2071A /* rubber_band.cpp in Sources */,
+				9588B35D0EE441B80007A94F /* nitro.cpp in Sources */,
+				9588B35E0EE441B80007A94F /* skid_mark.cpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};