From 6685e78605445865dd18662124cb69870f47f7e9 Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Wed, 30 Sep 2020 13:24:37 +0200
Subject: [PATCH] Fixed red background wrongly showing up when slicing with SLA
 printer

---
 src/slic3r/GUI/GLCanvas3D.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index b916bfc546..a3b4be9a7a 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -5420,7 +5420,9 @@ void GLCanvas3D::_render_background() const
 #if ENABLE_GCODE_VIEWER
     bool use_error_color = false;
     if (wxGetApp().is_editor()) {
-        use_error_color = m_dynamic_background_enabled;
+        use_error_color = m_dynamic_background_enabled &&
+            (wxGetApp().preset_bundle->printers.get_edited_preset().printer_technology() != ptSLA || !m_volumes.empty());
+
         if (!m_volumes.empty())
             use_error_color &= _is_any_volume_outside();
         else {