Gap fill tool tip clarification & filter_out_gap_fill setting visibil…

…ity (SoftFever#6468)

* Gap fill tool tip clarification

* Gap fill text and parameter visibility update

src/libslic3r/PrintConfig.cpp

@@ -817,12 +817,22 @@ void PrintConfigDef::init_fff_params()
     def = this->add("gap_fill_target", coEnum);
     def->label = L("Apply gap fill");
     def->category = L("Strength");
-    def->tooltip = L("Enables gap fill for the selected surfaces. The minimum gap length that will be filled can be controlled "
+    def->tooltip = L("Enables gap fill for the selected solid surfaces. The minimum gap length that will be filled can be controlled "
                      "from the filter out tiny gaps option below.\n\n"
                      "Options:\n"
-                     "1. Everywhere: Applies gap fill to top, bottom and internal solid surfaces\n"
-                     "2. Top and Bottom surfaces: Applies gap fill to top and bottom surfaces only\n"
-                     "3. Nowhere: Disables gap fill\n");
+                     "1. Everywhere: Applies gap fill to top, bottom and internal solid surfaces for maximum strength\n"
+                     "2. Top and Bottom surfaces: Applies gap fill to top and bottom surfaces only, balancing print speed, "
+                     "reducing potential over extrusion in the solid infill and making sure the top and bottom surfaces have "
+                     "no pin hole gaps\n"
+                     "3. Nowhere: Disables gap fill for all solid infill areas. \n\n"
+                     "Note that if using the classic perimeter generator, gap fill may also be generated between perimeters, "
+                     "if a full width line cannot fit between them. That perimeter gap fill is not controlled by this setting. \n\n"
+                     "If you would like all gap fill, including the classic perimeter generated one, removed, "
+                     "set the filter out tiny gaps value to a large number, like 999999. \n\n"
+                     "However this is not advised, as gap fill between perimeters is contributing to the model's strength. "
+                     "For models where excessive gap fill is generated between perimeters, a better option would be to "
+                     "switch to the arachne wall generator and use this option to control whether the cosmetic top and "
+                     "bottom surface gap fill is generated");
     def->enum_keys_map = &ConfigOptionEnum<GapFillTarget>::get_enum_values();
     def->enum_values.push_back("everywhere");
     def->enum_values.push_back("topbottom");
@@ -2539,7 +2549,8 @@ void PrintConfigDef::init_fff_params()
     def = this->add("filter_out_gap_fill", coFloat);
     def->label = L("Filter out tiny gaps");
     def->category = L("Layers and Perimeters");
-    def->tooltip = L("Filter out gaps smaller than the threshold specified");
+    def->tooltip = L("Don't print gap fill with a length is smaller than the threshold specified (in mm). This setting applies to top, "
+                     "bottom and solid infill and, if using the classic perimeter generator, to wall gap fill. ");
     def->sidetext = L("mm");
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloat(0));

src/slic3r/GUI/ConfigManipulation.cpp

@@ -515,11 +515,6 @@ void ConfigManipulation::toggle_print_fff_options(DynamicPrintConfig *config, co
         apply(config, &new_conf);
     }
 
-    // Orca: Hide the filter out tiny gaps field when gap fill target is nowhere as no gap fill will be applied.
-    bool have_gap_fill = config->opt_enum<GapFillTarget>("gap_fill_target") != gftNowhere;
-    toggle_line("filter_out_gap_fill", have_gap_fill);
-
-
     bool have_perimeters = config->opt_int("wall_loops") > 0;
     for (auto el : { "extra_perimeters_on_overhangs", "ensure_vertical_shell_thickness", "detect_thin_wall", "detect_overhang_wall",
         "seam_position", "staggered_inner_seams", "wall_sequence", "outer_wall_line_width",