From cc585a646baa1e75fa288e6d9db037bc12e36825 Mon Sep 17 00:00:00 2001
From: Kiss Lorand <50251547+kisslorand@users.noreply.github.com>
Date: Thu, 15 Jan 2026 16:39:19 +0200
Subject: [PATCH] Fix: Bring back "Only lift Z below" can be disabled (#11440)

Let "Only lift Z below" to be disabled
---
 src/libslic3r/GCodeWriter.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libslic3r/GCodeWriter.cpp b/src/libslic3r/GCodeWriter.cpp
index 1008e5eab1..b208148c2b 100644
--- a/src/libslic3r/GCodeWriter.cpp
+++ b/src/libslic3r/GCodeWriter.cpp
@@ -565,7 +565,7 @@ std::string GCodeWriter::lazy_lift(LiftType lift_type, bool spiral_vase)
         int filament_id = filament()->id();
         double above = this->config.retract_lift_above.get_at(extruder_id);
         double below = this->config.retract_lift_below.get_at(extruder_id);
-        if (m_pos.z() >= above && m_pos.z() <= below)
+        if (m_pos.z() >= above && (m_pos.z() <= below || below == 0.))
             target_lift = this->config.z_hop.get_at(filament_id);
     }
     // BBS
@@ -593,7 +593,7 @@ std::string GCodeWriter::eager_lift(const LiftType type) {
         int filament_id = filament()->id();
         double above = this->config.retract_lift_above.get_at(extruder_id);
         double below = this->config.retract_lift_below.get_at(extruder_id);
-        if (m_pos.z() >= above && m_pos.z() <= below)
+        if (m_pos.z() >= above && (m_pos.z() <= below || below == 0.))
             target_lift = this->config.z_hop.get_at(filament_id);
     }