diff --git a/src/slic3r/GUI/CameraUtils.cpp b/src/slic3r/GUI/CameraUtils.cpp
index 41425dd23..99d022e4b 100644
--- a/src/slic3r/GUI/CameraUtils.cpp
+++ b/src/slic3r/GUI/CameraUtils.cpp
@@ -110,12 +110,8 @@ void CameraUtils::ray_from_persp_screen_pos(const Camera &camera, const Vec2d &p
     Matrix4d modelview  = camera.get_view_matrix().matrix();
     Matrix4d projection = camera.get_projection_matrix().matrix();
     Vec4i    viewport(camera.get_viewport().data());
-
-    Vec3d unprojected_point;
-    igl::unproject(screen_point(camera, position), modelview, projection, viewport, unprojected_point);
-
-    point = camera.get_position();
-    direction = unprojected_point - point;
+    igl::unproject(screen_point(camera, position), modelview, projection, viewport, point);
+    direction = point - camera.get_position();
 }
 
 Vec2d CameraUtils::get_z0_position(const Camera &camera, const Vec2d & coor)
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp b/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
index 0202f8ada..5f000bb03 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
@@ -1426,6 +1426,7 @@ void GLGizmoCut3D::on_render()
 
 void GLGizmoCut3D::render_debug_input_window(float x)
 {
+    return;
     m_imgui->begin(wxString("DEBUG"));
 
     ImVec2 pos = ImGui::GetWindowPos();
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoCut.hpp b/src/slic3r/GUI/Gizmos/GLGizmoCut.hpp
index 88027f684..6158c0405 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoCut.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoCut.hpp
@@ -97,7 +97,7 @@ class GLGizmoCut3D : public GLGizmoBase
 
     bool m_hide_cut_plane{ false };
     bool m_connectors_editing{ false };
-    bool m_cut_plane_as_circle{ true };
+    bool m_cut_plane_as_circle{ false };
 
     float m_connector_depth_ratio{ 3.f };
     float m_connector_size{ 2.5f };