From b281c91b99155219242dfcfcaec35beb01444430 Mon Sep 17 00:00:00 2001
From: Kiss Lorand <50251547+kisslorand@users.noreply.github.com>
Date: Thu, 6 Aug 2026 17:54:11 +0300
Subject: [PATCH] Fix ignored filament-specific ironing speed override (#15082)

Fix overridden ironing speed

Use filament_ironing_speed for the active filament when configured, falling back to the process setting when unset.
---
 src/libslic3r/GCode.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index c20405781b..8e2e9f713c 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -7650,8 +7650,7 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
             if (sloped) {
                 speed = std::min(speed, m_config.scarf_joint_speed.get_abs_value(speed));
             }
-        } 
-        else if(path.role() == erInternalBridgeInfill) {
+        } else if(path.role() == erInternalBridgeInfill) {
             speed = m_config.get_abs_value_at("internal_bridge_speed", get_nozzle_config_index(m_writer.filament()->id()));
         } else if (path.role() == erOverhangPerimeter || path.role() == erSupportTransition || path.role() == erBridgeInfill) {
             speed = NOZZLE_CONFIG(bridge_speed);
@@ -7662,7 +7661,10 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
         } else if (path.role() == erTopSolidInfill) {
             speed = NOZZLE_CONFIG(top_surface_speed);
         } else if (path.role() == erIroning) {
-            speed = m_config.get_abs_value("ironing_speed");
+            const size_t filament_idx = get_filament_config_index(m_writer.filament()->id());
+            speed = m_config.filament_ironing_speed.is_nil(filament_idx)
+                ? m_config.get_abs_value("ironing_speed")
+                : m_config.filament_ironing_speed.get_at(filament_idx);
         } else if (path.role() == erBottomSurface) {
             speed = NOZZLE_CONFIG(initial_layer_infill_speed);
         } else if (path.role() == erGapFill) {