diff --git a/src/slic3r/GUI/GUI_Preview.cpp b/src/slic3r/GUI/GUI_Preview.cpp index 5f9ad5ba5..8c10fb157 100644 --- a/src/slic3r/GUI/GUI_Preview.cpp +++ b/src/slic3r/GUI/GUI_Preview.cpp @@ -789,8 +789,8 @@ void Preview::update_layers_slider_mode() return false; for (ModelVolume* volume : object->volumes) - if (volume->config.has("extruder") && - volume->config.option("extruder")->getInt() != extruder || + if ((volume->config.has("extruder") && + volume->config.option("extruder")->getInt() != extruder) || !volume->mmu_segmentation_facets.empty()) return false;