From 7af3eb90586ebf1604226a9b384d0c4a2213cf91 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Sun, 4 Mar 2018 21:35:33 +0100
Subject: [PATCH] Force recurse when opacity changed.

Fixes #1420.
---
 src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs b/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
index b219a74119..6005ee8b8f 100644
--- a/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
+++ b/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
@@ -170,8 +170,9 @@ namespace Avalonia.Rendering.SceneGraph
                     var clipBounds = bounds.TransformToAABB(contextImpl.Transform).Intersect(clip);
 
                     forceRecurse = forceRecurse ||
-                        node.Transform != contextImpl.Transform ||
-                        node.ClipBounds != clipBounds;
+                        node.ClipBounds != clipBounds ||
+                        node.Opacity != opacity ||
+                        node.Transform != contextImpl.Transform;
 
                     node.Transform = contextImpl.Transform;
                     node.ClipBounds = clipBounds;