diff --git a/src/slic3r/GUI/3DScene.cpp b/src/slic3r/GUI/3DScene.cpp
index 726bebe11..f42ab634a 100644
--- a/src/slic3r/GUI/3DScene.cpp
+++ b/src/slic3r/GUI/3DScene.cpp
@@ -684,11 +684,8 @@ void GLVolumeCollection::render(GLVolumeCollection::ERenderType type, bool disab
         glsafe(::glUniform4fv(clipping_plane_id, 1, (const GLfloat*)m_clipping_plane));
 
 #if ENABLE_SLOPE_RENDERING
-    if (slope_active_id != -1)
-        glsafe(::glUniform1i(slope_active_id, type == Opaque && m_slope_active ? 1 : 0));
-
     if (slope_z_range_id != -1)
-        glsafe(::glUniform2fv(slope_z_range_id, 1, (const GLfloat*)m_slope_z_range.data()));
+        glsafe(::glUniform2fv(slope_z_range_id, 1, (const GLfloat*)m_slope.z_range.data()));
 #endif // ENABLE_SLOPE_RENDERING
 
     GLVolumeWithIdAndZList to_render = volumes_to_render(this->volumes, type, view_matrix, filter_func);
@@ -706,6 +703,9 @@ void GLVolumeCollection::render(GLVolumeCollection::ERenderType type, bool disab
         if (print_box_worldmatrix_id != -1)
             glsafe(::glUniformMatrix4fv(print_box_worldmatrix_id, 1, GL_FALSE, (const GLfloat*)volume.first->world_matrix().cast<float>().data()));
 
+        if (slope_active_id != -1)
+            glsafe(::glUniform1i(slope_active_id, m_slope.active && !volume.first->is_modifier && !volume.first->is_wipe_tower ? 1 : 0));
+
         if (slope_normal_matrix_id != -1)
         {
             Matrix3f normal_matrix = volume.first->world_matrix().matrix().block(0, 0, 3, 3).inverse().transpose().cast<float>();
diff --git a/src/slic3r/GUI/3DScene.hpp b/src/slic3r/GUI/3DScene.hpp
index 2d1fe2bb5..a397f4a1c 100644
--- a/src/slic3r/GUI/3DScene.hpp
+++ b/src/slic3r/GUI/3DScene.hpp
@@ -497,10 +497,15 @@ private:
     float m_clipping_plane[4];
 
 #if ENABLE_SLOPE_RENDERING
-    // toggle for slope rendering 
-    bool m_slope_active { false };
-    // [0] = yellow, [1] = red
-    std::array<float, 2> m_slope_z_range;
+    struct Slope
+    {
+        // toggle for slope rendering 
+        bool active{ false };
+        // [0] = yellow, [1] = red
+        std::array<float, 2> z_range;
+    };
+
+    Slope m_slope;
 #endif // ENABLE_SLOPE_RENDERING
 
 public:
@@ -570,12 +575,12 @@ public:
     void set_clipping_plane(const double* coeffs) { m_clipping_plane[0] = coeffs[0]; m_clipping_plane[1] = coeffs[1]; m_clipping_plane[2] = coeffs[2]; m_clipping_plane[3] = coeffs[3]; }
 
 #if ENABLE_SLOPE_RENDERING
-    bool is_slope_active() const { return m_slope_active; }
-    void set_slope_active(bool active) { m_slope_active = active; }
+    bool is_slope_active() const { return m_slope.active; }
+    void set_slope_active(bool active) { m_slope.active = active; }
 
-    const std::array<float, 2>& get_slope_z_range() const { return m_slope_z_range; }
-    void set_slope_z_range(const std::array<float, 2>& range) { m_slope_z_range = range; }
-    void set_default_slope_z_range() { m_slope_z_range = { -::cos(Geometry::deg2rad(90.0f - 45.0f)), -::cos(Geometry::deg2rad(90.0f - 70.0f)) }; }
+    const std::array<float, 2>& get_slope_z_range() const { return m_slope.z_range; }
+    void set_slope_z_range(const std::array<float, 2>& range) { m_slope.z_range = range; }
+    void set_default_slope_z_range() { m_slope.z_range = { -::cos(Geometry::deg2rad(90.0f - 45.0f)), -::cos(Geometry::deg2rad(90.0f - 70.0f)) }; }
 #endif // ENABLE_SLOPE_RENDERING
 
     // returns true if all the volumes are completely contained in the print volume