diff --git a/Assets/Prefabs/Tracks/Racetrack3.prefab b/Assets/Prefabs/Tracks/Racetrack3.prefab
index be19b1f..99081f8 100644
--- a/Assets/Prefabs/Tracks/Racetrack3.prefab
+++ b/Assets/Prefabs/Tracks/Racetrack3.prefab
@@ -118,7 +118,7 @@ GameObject:
   - component: {fileID: 5984816054950275906}
   m_Layer: 0
   m_Name: Directional Light
-  m_TagString: Untagged
+  m_TagString: Wall
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
@@ -211,7 +211,7 @@ GameObject:
   - component: {fileID: 8087186547245897647}
   m_Layer: 0
   m_Name: Roads
-  m_TagString: Untagged
+  m_TagString: Wall
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
@@ -504,7 +504,7 @@ Transform:
   serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
-  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_LocalScale: {x: 0.25, y: 0.25, z: 0.25}
   m_ConstrainProportionsScale: 0
   m_Children:
   - {fileID: 4284112531985709252}
@@ -713,6 +713,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (16)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -837,6 +841,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (12)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -961,6 +969,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (1)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -1479,6 +1491,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4 (3)
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 8286367817191474789, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
       propertyPath: m_LocalPosition.x
       value: 340
@@ -1665,6 +1681,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4 (6)
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 8286367817191474789, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
       propertyPath: m_LocalPosition.x
       value: 340
@@ -1891,6 +1911,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_1
       objectReference: {fileID: 0}
+    - target: {fileID: 8410669659217247332, guid: cfeef7a383f64dd42858adebe9695e21, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -1975,6 +1999,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4 (2)
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 8286367817191474789, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
       propertyPath: m_LocalPosition.x
       value: -20
@@ -2535,6 +2563,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building_4
       objectReference: {fileID: 0}
+    - target: {fileID: 5345989541031838911, guid: 199c596390d2eaa46bc78a2125c0bb27, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -2597,6 +2629,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_3 (3)
       objectReference: {fileID: 0}
+    - target: {fileID: 5967869824292217363, guid: 1d44684513e082249b0990b026013ee1, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -2671,6 +2707,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (22)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -2693,6 +2733,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4 (5)
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 8286367817191474789, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
       propertyPath: m_LocalPosition.x
       value: -20
@@ -2795,6 +2839,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_3
       objectReference: {fileID: 0}
+    - target: {fileID: 5967869824292217363, guid: 1d44684513e082249b0990b026013ee1, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -2931,6 +2979,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_3 (7)
       objectReference: {fileID: 0}
+    - target: {fileID: 5967869824292217363, guid: 1d44684513e082249b0990b026013ee1, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -3055,6 +3107,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building_5 (1)
       objectReference: {fileID: 0}
+    - target: {fileID: 4362175174644425941, guid: bc1fcc09db32c124f81884667c4ace3e, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -3117,6 +3173,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_2
       objectReference: {fileID: 0}
+    - target: {fileID: 4518475278962914966, guid: 6415c408862f2dd4387d48ce30db11c1, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects:
     - {fileID: 7953330157957066419, guid: 6415c408862f2dd4387d48ce30db11c1, type: 3}
@@ -3257,6 +3317,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (20)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -3517,6 +3581,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building_2
       objectReference: {fileID: 0}
+    - target: {fileID: 3637553402588506572, guid: 850daf50c2ddb2e4c92b9380a904c84d, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -3777,6 +3845,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (19)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -3851,6 +3923,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (6)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -3913,6 +3989,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building_6
       objectReference: {fileID: 0}
+    - target: {fileID: 6836673674870442377, guid: e916006e0a02e3b4ea2251eaa2029e5a, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -4505,6 +4585,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4 (7)
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 8286367817191474789, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
       propertyPath: m_LocalPosition.x
       value: 100
@@ -4607,6 +4691,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building_2 (1)
       objectReference: {fileID: 0}
+    - target: {fileID: 3637553402588506572, guid: 850daf50c2ddb2e4c92b9380a904c84d, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -4979,6 +5067,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_1 (4)
       objectReference: {fileID: 0}
+    - target: {fileID: 8410669659217247332, guid: cfeef7a383f64dd42858adebe9695e21, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -5261,6 +5353,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4 (4)
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 8286367817191474789, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
       propertyPath: m_LocalPosition.x
       value: -140
@@ -5363,6 +5459,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: circular_tall_building
       objectReference: {fileID: 0}
+    - target: {fileID: 4984589678492589191, guid: 2340d95e1f9980346a62b057bd9b5b0e, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -5509,6 +5609,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building 7
       objectReference: {fileID: 0}
+    - target: {fileID: 3881102357718049861, guid: 87c7a8917161d884ebb674f89e53a263, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 5083274512095415034, guid: 87c7a8917161d884ebb674f89e53a263, type: 3}
       propertyPath: m_LocalPosition.x
       value: 75
@@ -6057,6 +6161,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (14)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -6553,6 +6661,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (15)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -6761,6 +6873,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: SM_Bld_Station_02
       objectReference: {fileID: 0}
+    - target: {fileID: 154410, guid: 1a6cea8227331c841ba3a0f95dfbe662, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 417924, guid: 1a6cea8227331c841ba3a0f95dfbe662, type: 3}
       propertyPath: m_LocalPosition.x
       value: 15
@@ -6987,6 +7103,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (3)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -7383,6 +7503,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (18)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -7643,6 +7767,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (23)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -7705,6 +7833,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building_5
       objectReference: {fileID: 0}
+    - target: {fileID: 4362175174644425941, guid: bc1fcc09db32c124f81884667c4ace3e, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -8163,6 +8295,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (13)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -8827,6 +8963,10 @@ PrefabInstance:
       propertyPath: m_LocalEulerAnglesHint.z
       value: 0
       objectReference: {fileID: 0}
+    - target: {fileID: 1915818325675539370, guid: a5cc261231f5a6a4c88239b1dab368cb, type: 3}
+      propertyPath: m_Materials.Array.data[0]
+      value: 
+      objectReference: {fileID: 2100000, guid: a4b9bd889f9c4bd498794c6ffd6f9e44, type: 2}
     - target: {fileID: 7234834637752836426, guid: a5cc261231f5a6a4c88239b1dab368cb, type: 3}
       propertyPath: m_Name
       value: CheckPoint (17)
@@ -8977,6 +9117,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: tall_building
       objectReference: {fileID: 0}
+    - target: {fileID: 653047688477967219, guid: f2bf9567c1c18ff43a272236f1841916, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 5824437383196071818, guid: f2bf9567c1c18ff43a272236f1841916, type: 3}
       propertyPath: m_LocalPosition.x
       value: 25
@@ -9327,6 +9471,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_1 (2)
       objectReference: {fileID: 0}
+    - target: {fileID: 8410669659217247332, guid: cfeef7a383f64dd42858adebe9695e21, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -9451,6 +9599,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_3 (2)
       objectReference: {fileID: 0}
+    - target: {fileID: 5967869824292217363, guid: 1d44684513e082249b0990b026013ee1, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -9845,6 +9997,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
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       propertyPath: m_LocalPosition.x
       value: -20
@@ -9969,6 +10125,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_4 (1)
       objectReference: {fileID: 0}
+    - target: {fileID: 7743065335511072018, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 8286367817191474789, guid: 715ee2969f9952449b80462def5d71cf, type: 3}
       propertyPath: m_LocalPosition.x
       value: 220
@@ -10257,6 +10417,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (5)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
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     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -10815,6 +10979,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: city_block_3 (6)
       objectReference: {fileID: 0}
+    - target: {fileID: 5967869824292217363, guid: 1d44684513e082249b0990b026013ee1, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
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     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -11013,6 +11181,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (4)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -11347,6 +11519,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (9)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -11369,6 +11545,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: SM_Bld_OfficeOld_Large_01
       objectReference: {fileID: 0}
+    - target: {fileID: 100086, guid: 82f734b8de4c88b4fbdc5232659df70f, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     - target: {fileID: 464606, guid: 82f734b8de4c88b4fbdc5232659df70f, type: 3}
       propertyPath: m_LocalPosition.x
       value: 25
@@ -11991,6 +12171,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: small_road_with_trees (11)
       objectReference: {fileID: 0}
+    - target: {fileID: 4985608862549245850, guid: dbef92ac58ab7054c98ebc1f698051a7, type: 3}
+      propertyPath: m_TagString
+      value: Wall
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -12075,6 +12259,10 @@ PrefabInstance:
       propertyPath: m_Name
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