From 0becfa0a0486daed4509f6688e7458b868b19d0a Mon Sep 17 00:00:00 2001
From: Enrico Turri <enricoturri@seznam.cz>
Date: Mon, 19 Aug 2019 15:44:22 +0200
Subject: [PATCH] Fix of #2739

---
 src/slic3r/GUI/3DBed.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/slic3r/GUI/3DBed.cpp b/src/slic3r/GUI/3DBed.cpp
index 97e200b38e..5b7473980f 100644
--- a/src/slic3r/GUI/3DBed.cpp
+++ b/src/slic3r/GUI/3DBed.cpp
@@ -609,10 +609,12 @@ void Bed3D::render_default(bool bottom) const
         if (!has_model && !bottom)
         {
             // draw background
+            glsafe(::glDepthMask(GL_FALSE));
             glsafe(::glColor4f(0.35f, 0.35f, 0.35f, 0.4f));
             glsafe(::glNormal3d(0.0f, 0.0f, 1.0f));
             glsafe(::glVertexPointer(3, GL_FLOAT, m_triangles.get_vertex_data_size(), (GLvoid*)m_triangles.get_vertices_data()));
             glsafe(::glDrawArrays(GL_TRIANGLES, 0, (GLsizei)triangles_vcount));
+            glsafe(::glDepthMask(GL_TRUE));
         }
 
         // draw grid