From 7e335525600d5446901361de0ad0c4f088a756a4 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sun, 9 Sep 2018 14:48:29 -0400
Subject: [PATCH] 
 https://imagemagick.org/discourse-server/viewtopic.php?f=3&t=34675

---
 MagickCore/composite.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MagickCore/composite.c b/MagickCore/composite.c
index d1351ed9e..25b43670d 100644
--- a/MagickCore/composite.c
+++ b/MagickCore/composite.c
@@ -2262,7 +2262,7 @@ MagickExport MagickBooleanType CompositeImage(Image *image,
           }
           case StereoCompositeOp:
           {
-            if ((channel == GreenPixelChannel) || (channel == BluePixelChannel))
+            if (channel == RedPixelChannel)
               pixel=(MagickRealType) GetPixelRed(source_image,p);
             break;
           }
-- 
2.40.0