From 1cd4bca6482a154fe030c858ed9561588704d9ee Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Tue, 4 Apr 2017 15:47:00 +0200
Subject: [PATCH] Fixed regression causing background processing to be
 partially active regardless of preferences. #3843

---
 lib/Slic3r/GUI/Plater.pm | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index b641398dc..364f9c191 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -1398,12 +1398,12 @@ sub async_apply_config {
     $self->{toolpaths2D}->reload_print if $self->{toolpaths2D};
     $self->{preview3D}->reload_print if $self->{preview3D};
     
+    if (!$Slic3r::GUI::Settings->{_}{background_processing}) {
+        $self->hide_preview if $invalidated;
+        return;
+    }
+    
     if ($invalidated) {
-        if (!$Slic3r::GUI::Settings->{_}{background_processing}) {
-            $self->hide_preview;
-            return;
-        }
-        
         # kill current thread if any
         $self->stop_background_process;
         # remove the sliced statistics box because something changed.