From ac2b6de62bd38e6f9dd87f26f2a0394d7b6b41c7 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sat, 13 Dec 2014 20:56:22 +0100
Subject: [PATCH] Minor addition to OpenGL code to prevent darker models

---
 lib/Slic3r/GUI/PreviewCanvas.pm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Slic3r/GUI/PreviewCanvas.pm b/lib/Slic3r/GUI/PreviewCanvas.pm
index ee2cf302e..25b5de93c 100644
--- a/lib/Slic3r/GUI/PreviewCanvas.pm
+++ b/lib/Slic3r/GUI/PreviewCanvas.pm
@@ -594,6 +594,8 @@ sub Render {
             }
         }
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        glFlush();
+        glFinish();
         glEnable(GL_LIGHTING);
     }
     # draw objects