diff --git a/Source/AssetRipper.Export.UnityProjects/Project/SceneExportCollection.cs b/Source/AssetRipper.Export.UnityProjects/Project/SceneExportCollection.cs
index f065c7ccb..9e79ba0aa 100644
--- a/Source/AssetRipper.Export.UnityProjects/Project/SceneExportCollection.cs
+++ b/Source/AssetRipper.Export.UnityProjects/Project/SceneExportCollection.cs
@@ -111,9 +111,8 @@ public class SceneExportCollection : ExportCollection, IComparer<IUnityObjectBas
 
 	private bool IsSceneDuplicate(IExportContainer container)
 	{
-		if (SceneHelpers.IsSceneName(File.Name))
+		if (SceneHelpers.TryGetFileNameToSceneIndex(File.Name, File.OriginalVersion, out int index))
 		{
-			int index = SceneHelpers.FileNameToSceneIndex(File.Name, File.OriginalVersion);
 			return container.IsSceneDuplicate(index);
 		}
 		return false;
diff --git a/Source/AssetRipper.Processing/Scenes/SceneHelpers.cs b/Source/AssetRipper.Processing/Scenes/SceneHelpers.cs
index f76e8c41b..6bcc413ad 100644
--- a/Source/AssetRipper.Processing/Scenes/SceneHelpers.cs
+++ b/Source/AssetRipper.Processing/Scenes/SceneHelpers.cs
@@ -17,21 +17,33 @@ public static partial class SceneHelpers
 	private const string LevelName = "level";
 	private const string MainSceneName = "maindata";
 
-	public static int FileNameToSceneIndex(string name, UnityVersion version)
+	public static bool TryGetFileNameToSceneIndex(string name, UnityVersion version, out int index)
 	{
 		if (HasMainData(version))
 		{
 			if (name == MainSceneName)
 			{
-				return 0;
+				index = 0;
+				return true;
 			}
 
-			return int.Parse(name.AsSpan(LevelName.Length)) + 1;
+			if (SceneNameFormat.IsMatch(name))
+			{
+				index = int.Parse(name.AsSpan(LevelName.Length)) + 1;
+				return true;
+			}
 		}
 		else
 		{
-			return int.Parse(name.AsSpan(LevelName.Length));
+			if (SceneNameFormat.IsMatch(name))
+			{
+				index = int.Parse(name.AsSpan(LevelName.Length));
+				return true;
+			}
 		}
+
+		index = -1;
+		return false;
 	}
 
 	/// <summary>
@@ -70,9 +82,8 @@ public static partial class SceneHelpers
 
 	public static bool TryGetScenePath(AssetCollection collection, [NotNullWhen(true)] IBuildSettings? buildSettings, [NotNullWhen(true)] out string? result)
 	{
-		if (buildSettings is not null && IsSceneName(collection.Name))
+		if (buildSettings is not null && TryGetFileNameToSceneIndex(collection.Name, collection.OriginalVersion, out int index))
 		{
-			int index = FileNameToSceneIndex(collection.Name, collection.OriginalVersion);
 			if (index >= buildSettings.Scenes.Count)
 			{
 				//This can happen in the following situation:
@@ -137,8 +148,6 @@ public static partial class SceneHelpers
 		return false;
 	}
 
-	public static bool IsSceneName(string name) => name == MainSceneName || SceneNameFormat.IsMatch(name);
-
 	[GeneratedRegex("^level(0|([1-9][0-9]*))$")]
 	private static partial Regex SceneNameFormat { get; }
 }