diff --git a/game/addons/mesh_data_resource_editor/utilities/mdred_mesh_utils.gd b/game/addons/mesh_data_resource_editor/utilities/mdred_mesh_utils.gd
index a64c5859..1124f5fe 100644
--- a/game/addons/mesh_data_resource_editor/utilities/mdred_mesh_utils.gd
+++ b/game/addons/mesh_data_resource_editor/utilities/mdred_mesh_utils.gd
@@ -1005,6 +1005,8 @@ static func apply_seam(mdr : MeshDataResource) -> void:
 	
 	var vertices : PoolVector3Array = arrays[ArrayMesh.ARRAY_VERTEX]
 	var indices : PoolIntArray = arrays[ArrayMesh.ARRAY_INDEX]
+	var new_indices : PoolIntArray = PoolIntArray()
+	new_indices.append_array(indices)
 
 	var seams : PoolIntArray = mdr.seams
 	
@@ -1062,7 +1064,6 @@ static func apply_seam(mdr : MeshDataResource) -> void:
 			tri.processed = true
 
 			if tri.both_sides_need_cut():
-				duplicate_verts_indices.push_back(tri.orig_index)
 				triangle_arrays.push_back([ tri ])
 				continue
 			
@@ -1105,19 +1106,15 @@ static func apply_seam(mdr : MeshDataResource) -> void:
 		# Skip processing the first strip, so we don't create unused verts
 		for tind in range(1, triangle_arrays.size()):
 			var tris : Array = triangle_arrays[tind]
-			
+
 			duplicate_verts_indices.push_back(tris[0].orig_index)
-			
-			#print(tris)
-			
+
 			for tri in tris:
-				indices[tri.index_index] = new_vert_size
+				new_indices[tri.index_index] = new_vert_size
 			
 			new_vert_size += 1
 
-		#print("----")
-
-	arrays[ArrayMesh.ARRAY_INDEX] = indices
+	arrays[ArrayMesh.ARRAY_INDEX] = new_indices
 
 	mdr.array = seam_apply_duplicate_vertices(arrays, duplicate_verts_indices)
 
diff --git a/game/test_mdr/Spatial.tscn b/game/test_mdr/Spatial.tscn
index ebe40e86..b8f700c9 100644
--- a/game/test_mdr/Spatial.tscn
+++ b/game/test_mdr/Spatial.tscn
@@ -3,7 +3,9 @@
 [ext_resource path="res://modules/planets/test_planet/voxel_library/textures/grass_mossy_albedo.png" type="Texture" id=1]
 
 [sub_resource type="MeshDataResource" id=1]
+array = [ PoolVector3Array( -0.5, -0.5, 0.5, -0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, -0.5, 0.5, -0.5, -0.5, -0.5, 0.5, 0.5, -0.5, -0.5, 0.5, -0.5, 0.5, -0.5, -0.5, -0.5, 0.5, 0.5, -0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, -0.5, -0.5, 0.5, -0.5, -0.5, 0.5, -0.5 ), PoolVector3Array( 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, -1, 0, 0, -1, 0, 0, -1 ), null, null, PoolVector2Array( 0.253049, 0.336022, 0.253049, 0.00806455, 0.5, 0.00806452, 0.5, 0.336022, 0.253049, 0.663978, 0.5, 0.991935, 0.253049, 0.991935, 0.5, 0.663978, 0.00609756, 0.336022, 0.993902, 0.336021, 0.746951, 0.336021, 0.746951, 0.663978, 0.00609758, 0.663979, 0.993902, 0.663978 ), null, null, null, PoolIntArray( 0, 1, 2, 2, 3, 0, 4, 5, 6, 4, 7, 5, 3, 10, 11, 11, 7, 3, 0, 12, 8, 0, 4, 12, 9, 13, 11, 11, 10, 9, 0, 7, 4, 0, 3, 7 ) ]
 aabb = AABB( -0.5, -0.5, -0.5, 1, 1, 1 )
+seams = PoolIntArray( 1, 6, 4, 6, 0, 1, 1, 2, 5, 6, 2, 3, 5, 7 )
 
 [sub_resource type="SpatialMaterial" id=2]
 albedo_texture = ExtResource( 1 )