diff --git a/src/libslic3r/Technologies.hpp b/src/libslic3r/Technologies.hpp
index 8f372e7c5..c75450080 100644
--- a/src/libslic3r/Technologies.hpp
+++ b/src/libslic3r/Technologies.hpp
@@ -36,15 +36,6 @@
 #define ENABLE_FIXED_SCREEN_SIZE_POINT_MARKERS 1
 
 
-//====================
-// 2.4.0.beta1 techs
-//====================
-#define ENABLE_2_4_0_BETA1 1
-
-// Enable rendering modifiers and similar objects always as transparent
-#define ENABLE_MODIFIERS_ALWAYS_TRANSPARENT (1 && ENABLE_2_4_0_BETA1)
-
-
 //====================
 // 2.4.0.beta2 techs
 //====================
diff --git a/src/slic3r/GUI/3DScene.cpp b/src/slic3r/GUI/3DScene.cpp
index 94b1f3156..263ba0e73 100644
--- a/src/slic3r/GUI/3DScene.cpp
+++ b/src/slic3r/GUI/3DScene.cpp
@@ -451,15 +451,9 @@ std::array<float, 4> color_from_model_volume(const ModelVolume& model_volume)
         color[2] = 0.2f;
     }
     else if (model_volume.is_modifier()) {
-#if ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
         color[0] = 1.0f;
         color[1] = 1.0f;
         color[2] = 0.2f;
-#else
-        color[0] = 0.2f;
-        color[1] = 1.0f;
-        color[2] = 0.2f;
-#endif // ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
     }
     else if (model_volume.is_support_blocker()) {
         color[0] = 1.0f;
@@ -845,15 +839,11 @@ void GLVolumeCollection::render(GLVolumeCollection::ERenderType type, bool disab
         glsafe(::glDisable(GL_CULL_FACE));
 
     for (GLVolumeWithIdAndZ& volume : to_render) {
-#if ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
         if (type == ERenderType::Transparent)
             volume.first->force_transparent = true;
-#endif // ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
         volume.first->set_render_color();
-#if ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
         if (type == ERenderType::Transparent)
             volume.first->force_transparent = false;
-#endif // ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
 
         // render sinking contours of non-hovered volumes
         if (m_show_sinking_contours)
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 6d5bc3eb4..98dd241e4 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -1302,15 +1302,6 @@ bool GLCanvas3D::is_reload_delayed() const
 void GLCanvas3D::enable_layers_editing(bool enable)
 {
     m_layers_editing.set_enabled(enable);
-#if !ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
-    const Selection::IndicesList& idxs = m_selection.get_volume_idxs();
-    for (unsigned int idx : idxs) {
-        GLVolume* v = m_volumes.volumes[idx];
-        if (v->is_modifier)
-            v->force_transparent = enable;
-    }
-#endif // !ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
-
     set_as_dirty();
 }
 
diff --git a/src/slic3r/GUI/Selection.cpp b/src/slic3r/GUI/Selection.cpp
index 406617d5a..8d99bd48b 100644
--- a/src/slic3r/GUI/Selection.cpp
+++ b/src/slic3r/GUI/Selection.cpp
@@ -448,7 +448,6 @@ void Selection::clear()
     if (m_list.empty())
         return;
 
-#if ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
     // ensure that the volumes get the proper color before next call to render (expecially needed for transparent volumes)
     for (unsigned int i : m_list) {
         GLVolume& volume = *(*m_volumes)[i];
@@ -460,13 +459,6 @@ void Selection::clear()
         if (transparent)
             volume.force_transparent = false;
     }
-#else
-    for (unsigned int i : m_list) {
-        (*m_volumes)[i]->selected = false;
-        // ensure the volume gets the proper color before next call to render (expecially needed for transparent volumes)
-        (*m_volumes)[i]->set_render_color();
-    }
-#endif // ENABLE_MODIFIERS_ALWAYS_TRANSPARENT
 
     m_list.clear();