From 6d2de80855d02a512f3646cd77f737d63da7f395 Mon Sep 17 00:00:00 2001
From: Alvin Meng <alvin.q.meng@gmail.com>
Date: Mon, 22 Jul 2024 22:50:01 -0400
Subject: [PATCH] option to preserve render queue when replacing shader

---
 Source/MaterialDef.cs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Source/MaterialDef.cs b/Source/MaterialDef.cs
index 354f99f..d520b6c 100644
--- a/Source/MaterialDef.cs
+++ b/Source/MaterialDef.cs
@@ -58,6 +58,8 @@ public class MaterialDef
 	[Persistent(name = "shader")] public string shaderName = null;
 	public Shader shader = null;
 
+	[Persistent] public bool preserveRenderQueue = false;
+
 	public Dictionary<string, bool> keywords;
 	public Dictionary<string, float> floats;
 	public Dictionary<string, Color> colors;
@@ -132,7 +134,12 @@ static object ParseColor(string value)
 
 	public void ApplyTo(Material material)
 	{
-		if (shader != null) material.shader = shader;
+		if (shader != null) {
+			// Replacing the shader resets the render queue to the shader's default.
+			var renderQueue = preserveRenderQueue ? material.renderQueue : -1;
+			material.shader = shader;
+			material.renderQueue = renderQueue;
+		}
 
 		foreach (var kvp in keywords) {
 			if (kvp.Value) material.EnableKeyword(kvp.Key);