the temp color is stored separately...

Author: al2me6

Source/DynamicProperties/MaterialPropertyManager.cs

@@ -45,10 +45,10 @@ private void OnDestroy()
 		MpbCompilerCache.CheckCleared();
 
 		// Poor man's GC :'(
-		PartPatch.ClearOnSceneSwitch();
-		MaterialColorUpdaterPatch.ClearOnSceneSwitch();
-		ModuleColorChangerPatch.ClearOnSceneSwitch();
-		FairingPanelPatch.ClearOnSceneSwitch();
+		PartPatch.CheckCleared();
+		MaterialColorUpdaterPatch.CheckCleared();
+		ModuleColorChangerPatch.CheckCleared();
+		FairingPanelPatch.CheckCleared();
 
 		this.LogMessage("destroyed");
 	}
@@ -85,10 +85,21 @@ public bool Unregister(Renderer renderer)
 	}
 
 	/// Get a reference to the `Props` instance containing the stock properties of the given
-	/// `part` (namely, `_Opacity`, `_RimFalloff`, `_RimColor`, and `_TemperatureColor` (flight
-	/// only)). The returned instance must not be written to.
+	/// `part` (namely, `_Opacity`, `_RimFalloff`, and `_RimColor`).
+	/// The returned instance must not be written to.
 	public Props? GetStockPropsForPart(Part part) => PartPatch.Props.GetValueOrDefault(part);
 
+	/// Get the part's current `_TemperatureColor` property, if it is set (only in flight).
+	public Color? GetStockTemperatureColorForPart(Part part)
+	{
+		if (!MaterialColorUpdaterPatch.Props.TryGetValue(part.temperatureRenderer, out var props)) {
+			return null;
+		}
+
+		if (!props.HasColor(PhysicsGlobals.temperaturePropertyID)) return null;
+		return props.GetColorOrDefault(PhysicsGlobals.temperaturePropertyID);
+	}
+
 	public static void RegisterPropertyNamesForDebugLogging(params string[] properties)
 	{
 		foreach (var property in properties) PropIdToName.Register(property);
@@ -137,7 +148,7 @@ internal void Unregister(Props props)
 	private bool _propsUpdateScheduled = false;
 	private static readonly WaitForEndOfFrame WfEoF = new();
 
-	private IEnumerator<YieldInstruction> Co_propsLateUpdate()
+	private IEnumerator<YieldInstruction> Co_PropsLateUpdate()
 	{
 		yield return WfEoF;
 
@@ -160,7 +171,7 @@ internal void ScheduleLateUpdate(Props props)
 	{
 		propsLateUpdateQueue.Add(props);
 		if (_propsUpdateScheduled) return;
-		StartCoroutine(Co_propsLateUpdate());
+		StartCoroutine(Co_PropsLateUpdate());
 		_propsUpdateScheduled = true;
 	}
 }

Source/DynamicProperties/MpbCompiler.cs

@@ -14,7 +14,7 @@ internal class MpbCompiler : Disposable
 	/// Immutable.
 	internal readonly SortedSet<Props> Cascade;
 
-	private readonly HashSet<Renderer> linkedRenderers = [];
+	private readonly HashSet<Renderer> managedRenderers = [];
 	private readonly MaterialPropertyBlock mpb = new();
 	private readonly Dictionary<int, Props> idManagers = [];
 
@@ -40,16 +40,16 @@ internal MpbCompiler(SortedSet<Props> cascade)
 
 	internal void Register(Renderer renderer)
 	{
-		linkedRenderers.Add(renderer);
+		managedRenderers.Add(renderer);
 		Apply(renderer);
 	}
 
 	internal void Unregister(Renderer renderer)
 	{
-		linkedRenderers.Remove(renderer);
+		managedRenderers.Remove(renderer);
 		if (!renderer.IsDestroyed()) renderer.SetPropertyBlock(EmptyMpb);
 
-		if (linkedRenderers.Count > 0) return;
+		if (managedRenderers.Count > 0) return;
 		Log.Debug(
 			$"last renderer unregistered from MpbCompiler instance {RuntimeHelpers.GetHashCode(this)}");
 		MpbCompilerCache.Remove(this);
@@ -115,7 +115,7 @@ private void ApplyAll()
 	{
 		var hasDestroyedRenderer = false;
 
-		foreach (var renderer in linkedRenderers) {
+		foreach (var renderer in managedRenderers) {
 			if (renderer.IsDestroyed()) {
 				hasDestroyedRenderer = true;
 			} else {
@@ -128,7 +128,7 @@ private void ApplyAll()
 
 	#endregion
 
-	protected override bool IsUnused() => linkedRenderers.Count == 0;
+	protected override bool IsUnused() => managedRenderers.Count == 0;
 
 	protected override void OnDispose()
 	{

Source/DynamicProperties/Patches/StockPatch.cs

@@ -7,7 +7,7 @@ internal abstract class StockPatchBase<T>
 {
 	internal static readonly Dictionary<T, Props> Props = [];
 
-	internal static void ClearOnSceneSwitch()
+	internal static void CheckCleared()
 	{
 		if (Props.Count == 0) return;