diff --git a/3d-viewer/3d_rendering/3d_render_ogl_legacy/c3d_render_ogl_legacy.cpp b/3d-viewer/3d_rendering/3d_render_ogl_legacy/c3d_render_ogl_legacy.cpp
index 7ea1011d52..edba9bbc5f 100644
--- a/3d-viewer/3d_rendering/3d_render_ogl_legacy/c3d_render_ogl_legacy.cpp
+++ b/3d-viewer/3d_rendering/3d_render_ogl_legacy/c3d_render_ogl_legacy.cpp
@@ -576,7 +576,6 @@ bool C3D_RENDER_OGL_LEGACY::Redraw(
             aStatusReporter->Report( _( "Loading..." ) );
 
         reload( aStatusReporter, aWarningReporter );
-        setupMaterials();
 
         // generate a new 3D grid as the size of the board may had changed
         m_last_grid_type = m_boardAdapter.GridGet();
@@ -593,6 +592,8 @@ bool C3D_RENDER_OGL_LEGACY::Redraw(
         }
     }
 
+    setupMaterials();
+
     // Initial setup
     // /////////////////////////////////////////////////////////////////////////
     glDepthFunc( GL_LESS );
diff --git a/3d-viewer/3d_viewer/3d_viewer_settings.cpp b/3d-viewer/3d_viewer/3d_viewer_settings.cpp
index 689aa84dff..5dedb1c567 100644
--- a/3d-viewer/3d_viewer/3d_viewer_settings.cpp
+++ b/3d-viewer/3d_viewer/3d_viewer_settings.cpp
@@ -231,9 +231,9 @@ bool EDA_3D_VIEWER_SETTINGS::MigrateFromLegacy( wxConfigBase* aCfg )
 
     auto migrate_color =
             [&] ( const std::string& k_r, const std::string& k_g,
-                  const std::string &k_b, std::string dest )
+                  const std::string &k_b, std::string dest, double alpha = 1.0 )
             {
-                COLOR4D color( 1, 1, 1, 1 );
+                COLOR4D color( 1, 1, 1, alpha );
 
                 if( aCfg->Read( k_r, &color.r ) &&
                     aCfg->Read( k_g, &color.g ) && aCfg->Read( k_b, &color.b ) )
@@ -251,7 +251,7 @@ bool EDA_3D_VIEWER_SETTINGS::MigrateFromLegacy( wxConfigBase* aCfg )
     migrate_color(
             "SilkColor_Red", "SilkColor_Green", "SilkColor_Blue", "colors.silkscreen_bottom" );
     migrate_color( "SilkColor_Red", "SilkColor_Green", "SilkColor_Blue", "colors.silkscreen_top" );
-    migrate_color( "SMaskColor_Red", "SMaskColor_Green", "SMaskColor_Blue", "colors.soldermask" );
+    migrate_color( "SMaskColor_Red", "SMaskColor_Green", "SMaskColor_Blue", "colors.soldermask", 0.83 );
     migrate_color(
             "SPasteColor_Red", "SPasteColor_Green", "SPasteColor_Blue", "colors.solderpaste" );
 
diff --git a/3d-viewer/3d_viewer/eda_3d_viewer.cpp b/3d-viewer/3d_viewer/eda_3d_viewer.cpp
index c37382c415..6f8323514b 100644
--- a/3d-viewer/3d_viewer/eda_3d_viewer.cpp
+++ b/3d-viewer/3d_viewer/eda_3d_viewer.cpp
@@ -278,6 +278,14 @@ void EDA_3D_VIEWER::Redraw()
         m_canvas->Request_refresh( true );
 }
 
+void EDA_3D_VIEWER::refreshRender()
+{
+    if( m_boardAdapter.RenderEngineGet() == RENDER_ENGINE::OPENGL_LEGACY )
+        m_canvas->Request_refresh();
+    else
+        NewDisplay( true );
+}
+
 void EDA_3D_VIEWER::Exit3DFrame( wxCommandEvent &event )
 {
     wxLogTrace( m_logTrace, "EDA_3D_VIEWER::Exit3DFrame" );
@@ -328,22 +336,12 @@ void EDA_3D_VIEWER::Process_Special_Functions( wxCommandEvent &event )
     case ID_MENU3D_BGCOLOR_BOTTOM:
         if( Set3DColorFromUser( m_boardAdapter.m_BgColorBot, _( "Background Color, Bottom" ),
                                 nullptr ) )
-        {
-            if( m_boardAdapter.RenderEngineGet() == RENDER_ENGINE::OPENGL_LEGACY )
-                m_canvas->Request_refresh();
-            else
-                NewDisplay( true );
-        }
+            refreshRender();
         return;
 
     case ID_MENU3D_BGCOLOR_TOP:
         if( Set3DColorFromUser( m_boardAdapter.m_BgColorTop, _( "Background Color, Top" ), nullptr ) )
-        {
-            if( m_boardAdapter.RenderEngineGet() == RENDER_ENGINE::OPENGL_LEGACY )
-                m_canvas->Request_refresh();
-            else
-                NewDisplay( true );
-        }
+            refreshRender();
         return;
 
     case ID_MENU3D_SILKSCREEN_COLOR:
@@ -368,7 +366,7 @@ void EDA_3D_VIEWER::Process_Special_Functions( wxCommandEvent &event )
 
     case ID_MENU3D_STACKUP_COLORS:
         SynchroniseColoursWithBoard();
-        NewDisplay( true );
+        refreshRender();
         break;
 
     case ID_MENU3D_RESET_DEFAULTS:
@@ -751,13 +749,15 @@ void EDA_3D_VIEWER::SynchroniseColoursWithBoard()
                     m_boardAdapter.m_SolderMaskColorTop.r = color.Red() / 255.0;
                     m_boardAdapter.m_SolderMaskColorTop.g = color.Green() / 255.0;
                     m_boardAdapter.m_SolderMaskColorTop.b = color.Blue() / 255.0;
-                    m_boardAdapter.m_SolderMaskColorTop.a = color.Alpha() / 255.0;
+                    // Keep the previous alpha value
+                    //m_boardAdapter.m_SolderMaskColorTop.a = color.Alpha() / 255.0;
                     break;
                 case B_Mask:
                     m_boardAdapter.m_SolderMaskColorBot.r = color.Red() / 255.0;
                     m_boardAdapter.m_SolderMaskColorBot.g = color.Green() / 255.0;
                     m_boardAdapter.m_SolderMaskColorBot.b = color.Blue() / 255.0;
-                    m_boardAdapter.m_SolderMaskColorBot.a = color.Alpha() / 255.0;
+                    // Keep the previous alpha value
+                    //m_boardAdapter.m_SolderMaskColorBot.a = color.Alpha() / 255.0;
                     break;
                 default:
                     break;
@@ -922,7 +922,9 @@ bool EDA_3D_VIEWER::Set3DSilkScreenColorFromUser()
     if( Set3DColorFromUser( m_boardAdapter.m_SilkScreenColorTop, _( "Silkscreen Color" ), &colors, false, colors[0].m_Color ) )
     {
         m_boardAdapter.m_SilkScreenColorBot = m_boardAdapter.m_SilkScreenColorTop;
-        NewDisplay( true );
+
+        refreshRender();
+
         return true;
     }
 
@@ -953,10 +955,7 @@ bool EDA_3D_VIEWER::Set3DSolderMaskColorFromUser()
     {
         m_boardAdapter.m_SolderMaskColorBot = m_boardAdapter.m_SolderMaskColorTop;
 
-        if( m_boardAdapter.RenderEngineGet() == RENDER_ENGINE::OPENGL_LEGACY )
-            m_canvas->Request_refresh();
-        else
-            NewDisplay( true );
+        refreshRender();
 
         return true;
     }
@@ -976,7 +975,8 @@ bool EDA_3D_VIEWER::Set3DCopperColorFromUser()
 
     if( Set3DColorFromUser( m_boardAdapter.m_CopperColor, _( "Copper Color" ), &colors, false, colors[0].m_Color ) )
     {
-        NewDisplay( true );
+        refreshRender();
+
         return true;
     }
 
@@ -999,10 +999,7 @@ bool EDA_3D_VIEWER::Set3DBoardBodyColorFromUser()
 
     if( Set3DColorFromUser( m_boardAdapter.m_BoardBodyColor, _( "Board Body Color" ), &colors, true, colors[0].m_Color ) )
     {
-        if( m_boardAdapter.RenderEngineGet() == RENDER_ENGINE::OPENGL_LEGACY )
-            m_canvas->Request_refresh();
-        else
-            NewDisplay( true );
+        refreshRender();
 
         return true;
     }
@@ -1021,7 +1018,8 @@ bool EDA_3D_VIEWER::Set3DSolderPasteColorFromUser()
 
     if( Set3DColorFromUser( m_boardAdapter.m_SolderPasteColor, _( "Solder Paste Color" ), &colors, false, colors[0].m_Color ) )
     {
-        NewDisplay( true );
+        refreshRender();
+
         return true;
     }
 
diff --git a/3d-viewer/3d_viewer/eda_3d_viewer.h b/3d-viewer/3d_viewer/eda_3d_viewer.h
index ef045877d9..adeca389eb 100644
--- a/3d-viewer/3d_viewer/eda_3d_viewer.h
+++ b/3d-viewer/3d_viewer/eda_3d_viewer.h
@@ -199,6 +199,8 @@ private:
      */
     void RenderEngineChanged();
 
+    void refreshRender();
+
     DECLARE_EVENT_TABLE()
 
  private: