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Merged
HellAholic merged 4 commits into from
Dec 19, 2025
Merged

CURA-12361 add skin support #21206

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9599929
Add settings for skin support
wawanbreton Nov 27, 2025
9de6f6f
Remove obsolete settings
wawanbreton Dec 11, 2025
6b275d2
Merge branch 'CURA-12833_improve-bridge-lines-direction' into CURA-12…
wawanbreton Dec 11, 2025
c63e0e9
Merge branch 'main' into CURA-12361_add-skin-support
HellAholic Dec 17, 2025
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1 change: 0 additions & 1 deletion plugins/3MFWriter/SettingsExportModel.py
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Expand Up @@ -57,7 +57,6 @@ class SettingsExportModel(QObject):
'brim_smart_ordering',
'ooze_shield_enabled',
'bottom_skin_preshrink',
'skin_edge_support_thickness',
'alternate_carve_order',
'top_skin_preshrink',
'interlocking_enable'}
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125 changes: 74 additions & 51 deletions resources/definitions/fdmprinter.def.json
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Expand Up @@ -2455,52 +2455,86 @@
"limit_to_extruder": "infill_extruder_nr",
"settable_per_mesh": true
},
"skin_edge_support_thickness":
"skin_support":
{
"label": "Skin Edge Support Thickness",
"description": "The thickness of the extra infill that supports skin edges.",
"unit": "mm",
"default_value": 0,
"label": "Infill Skin Support",
"description": "Print a solid infill pattern just below skin to avoid printing the skin over air.",
"type": "bool",
"default_value": true,
"value": "infill_sparse_density < 50",
"enabled": "infill_sparse_density > 0 and top_layers > 0",
"settable_per_mesh": true,
"settable_per_extruder": true
},
"skin_support_speed":
{
"label": "Skin Support Speed",
"description": "The speed at which skin support regions are printed.",
"unit": "mm/s",
"type": "float",
"minimum_value": "0",
"maximum_value": "machine_height",
"maximum_value_warning": "resolveOrValue('infill_sparse_thickness') * 10",
"maximum_value": "math.sqrt(machine_max_feedrate_x ** 2 + machine_max_feedrate_y ** 2)",
"maximum_value_warning": "300",
"default_value": 15,
"value": "bridge_skin_speed",
"enabled": "skin_support",
"settable_per_mesh": true,
"settable_per_extruder": true
},
"skin_support_material_flow":
{
"label": "Skin Support Flow",
"description": "When printing skin support regions, the amount of material extruded is multiplied by this value.",
"unit": "%",
"default_value": 60,
"value": "bridge_skin_material_flow",
"type": "float",
"value": "0",
"limit_to_extruder": "infill_extruder_nr",
"enabled": "infill_sparse_density > 0",
"minimum_value": "5",
"minimum_value_warning": "50",
"maximum_value_warning": "250",
"enabled": "skin_support",
"settable_per_mesh": true,
"children":
{
"skin_edge_support_layers":
{
"label": "Skin Edge Support Layers",
"description": "The number of infill layers that supports skin edges.",
"default_value": 0,
"minimum_value": "0",
"maximum_value_warning": "10",
"type": "int",
"maximum_value": "999999",
"value": "math.ceil(round(skin_edge_support_thickness / resolveOrValue('infill_sparse_thickness'), 4))",
"limit_to_extruder": "infill_extruder_nr",
"enabled": "infill_sparse_density > 0",
"settable_per_mesh": true
}
}
"settable_per_extruder": true
},
"extra_infill_lines_to_support_skins":
"skin_support_density":
{
"label": "Extra Infill Lines To Support Skins",
"description": "Add extra lines into the infill pattern to support skins above. This option prevents holes or plastic blobs that sometime show in complex shaped skins due to the infill below not correctly supporting the skin layer being printed above. 'Walls' supports just the outlines of the skin, whereas 'Walls and Lines' also supports the ends of the lines that make up the skin.",
"type": "enum",
"options":
{
"walls_and_lines": "Walls and Lines",
"walls": "Walls Only",
"none": "None"
},
"default_value": "walls_and_lines",
"value": "'none' if infill_sparse_density > 50 else 'walls' if skin_edge_support_thickness > 0 else 'walls_and_lines'",
"enabled": "infill_sparse_density > 0 and infill_pattern not in ('lightning', 'concentric', 'cross','cross_3d') and wall_line_count > 0 and top_layers > 0"
"label": "Skin Support Density",
"description": "The density of the skin support layer. Values less than 100 will increase the gaps between the lines.",
"unit": "%",
"default_value": 100,
"value": "bridge_skin_density",
"type": "float",
"minimum_value": "5",
"minimum_value_warning": "20",
"maximum_value_warning": "100",
"enabled": "skin_support",
"settable_per_mesh": true,
"settable_per_extruder": true
},
"skin_support_fan_speed":
{
"label": "Skin Support Fan Speed",
"description": "Percentage fan speed to use when printing skin support.",
"unit": "%",
"minimum_value": "0",
"maximum_value": "100",
"default_value": 100,
"value": "bridge_fan_speed",
"type": "float",
"enabled": "skin_support",
"settable_per_mesh": true,
"settable_per_extruder": true
},
"skin_support_interlace_lines":
{
"label": "Interlace Skin Support Lines",
"description": "When enabled, skin support lines will be printed interlaced, i.e. in 2 monotonic passes so that adjacent lines won't be printed just after each other. The lines of the first pass then have more time to cool down and are stronger when the second pass is added.",
"default_value": false,
"value": "bridge_interlace_lines",
"type": "bool",
"enabled": "skin_support",
"settable_per_mesh": true,
"settable_per_extruder": true
},
"lightning_infill_support_angle":
{
Expand Down Expand Up @@ -8922,17 +8956,6 @@
"enabled": "bridge_settings_enabled",
"settable_per_mesh": true
},
"bridge_sparse_infill_max_density":
{
"label": "Bridge Sparse Infill Max Density",
"description": "Maximum density of infill considered to be sparse. Skin over sparse infill is considered to be unsupported and so may be treated as a bridge skin.",
"unit": "%",
"type": "float",
"default_value": 0,
"minimum_value": "0",
"enabled": "bridge_settings_enabled",
"settable_per_mesh": true
},
"bridge_wall_coast":
{
"label": "Bridge Wall Coasting",
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2 changes: 0 additions & 2 deletions resources/definitions/skriware_2.def.json
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Expand Up @@ -181,8 +181,6 @@
"retraction_speed": { "default_value": 30 },
"roofing_layer_count": { "value": "1" },
"roofing_material_flow": { "value": "99" },
"skin_edge_support_layers": { "value": "0" },
"skin_edge_support_thickness": { "value": "0" },
"skin_material_flow": { "value": "99" },
"skin_no_small_gaps_heuristic": { "default_value": true },
"skin_outline_count": { "value": 0 },
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3 changes: 0 additions & 3 deletions resources/definitions/ultimaker.def.json
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Expand Up @@ -31,7 +31,6 @@
"bridge_skin_speed_2": { "value": "speed_topbottom" },
"bridge_skin_speed_3": { "value": "speed_topbottom" },
"bridge_skin_support_threshold": { "value": 50 },
"bridge_sparse_infill_max_density": { "value": 0 },
"bridge_wall_coast": { "value": 0 },
"bridge_wall_material_flow": { "value": "wall_material_flow" },
"bridge_wall_speed": { "value": "bridge_skin_speed" },
Expand All @@ -41,7 +40,6 @@
"cool_min_layer_time_fan_speed_max": { "value": "cool_min_layer_time + 5" },
"cool_min_speed": { "value": "round(speed_wall_0 * 3 / 4) if cool_lift_head else round(speed_wall_0 / 5)" },
"cool_min_temperature": { "value": "max([material_final_print_temperature, material_initial_print_temperature, material_print_temperature - 15])" },
"extra_infill_lines_to_support_skins": { "value": "'none'" },
"gradual_support_infill_step_height": { "value": "4 * layer_height" },
"gradual_support_infill_steps": { "value": "2 if support_interface_enable and support_structure != 'tree' else 0" },
"infill_material_flow": { "value": "(1.95-infill_sparse_density / 100 if infill_sparse_density > 95 else 1) * material_flow" },
Expand Down Expand Up @@ -197,7 +195,6 @@
"roofing_layer_count": { "value": "1" },
"roofing_material_flow": { "value": "material_flow" },
"skin_angles": { "value": "[] if infill_pattern not in ['cross', 'cross_3d'] else [20, 110]" },
"skin_edge_support_thickness": { "value": "4 * layer_height if infill_sparse_density < 30 else 0" },
"skin_material_flow": { "value": "0.95 * material_flow" },
"skin_material_flow_layer_0": { "value": "95" },
"skin_monotonic": { "value": "roofing_layer_count == 0" },
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1 change: 0 additions & 1 deletion resources/definitions/ultimaker_factor4.def.json
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Expand Up @@ -66,7 +66,6 @@
"bridge_skin_material_flow": { "maximum_value": "100" },
"bridge_skin_material_flow_2": { "maximum_value": "100" },
"bridge_skin_material_flow_3": { "maximum_value": "100" },
"bridge_sparse_infill_max_density": { "value": "50" },
"bridge_wall_material_flow": { "maximum_value": "100" },
"bridge_wall_speed": { "value": "speed_wall" },
"brim_width": { "value": "5" },
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1 change: 0 additions & 1 deletion resources/definitions/ultimaker_method_base.def.json
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Expand Up @@ -199,7 +199,6 @@
"bridge_skin_speed": { "value": "speed_topbottom" },
"bridge_skin_speed_2": { "value": "speed_topbottom" },
"bridge_skin_speed_3": { "value": "speed_topbottom" },
"bridge_sparse_infill_max_density": { "value": 50 },
"bridge_wall_coast": { "value": 0 },
"bridge_wall_material_flow": { "value": "material_flow" },
"bridge_wall_speed": { "value": "speed_wall" },
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3 changes: 0 additions & 3 deletions resources/definitions/ultimaker_s8.def.json
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Expand Up @@ -210,7 +210,6 @@
},
"bridge_skin_speed_2": { "value": "speed_print*2/3" },
"bridge_skin_support_threshold": { "value": 20 },
"bridge_sparse_infill_max_density": { "value": 20 },
"bridge_wall_material_flow": { "value": 200 },
"bridge_wall_min_length": { "value": 2 },
"bridge_wall_speed": { "value": 50 },
Expand All @@ -232,7 +231,6 @@
"value": "material_print_temperature-15"
},
"default_material_print_temperature": { "maximum_value_warning": 320 },
"extra_infill_lines_to_support_skins": { "value": "'walls_and_lines'" },
"flooring_layer_count": { "value": 1 },
"flooring_material_flow": { "value": "skin_material_flow * 110/93" },
"flooring_monotonic": { "value": false },
Expand Down Expand Up @@ -455,7 +453,6 @@
"roofing_expansion": { "value": 1.2 },
"roofing_pattern": { "value": "'lines'" },
"seam_overhang_angle": { "value": 35 },
"skin_edge_support_thickness": { "value": 0.8 },
"skin_material_flow": { "value": 93 },
"skin_outline_count": { "value": 0 },
"skin_overlap": { "value": 20 },
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2 changes: 0 additions & 2 deletions resources/definitions/ultimaker_sketch_sprint.def.json
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Expand Up @@ -102,7 +102,6 @@
"bridge_skin_speed": { "value": 50 },
"bridge_skin_speed_2": { "value": 50 },
"bridge_skin_speed_3": { "value": 50 },
"bridge_sparse_infill_max_density": { "value": 15 },
"bridge_wall_min_length": { "value": 2.4 },
"bridge_wall_speed": { "value": 20 },
"brim_gap": { "value": 0.32 },
Expand Down Expand Up @@ -223,7 +222,6 @@
"retraction_prime_speed": { "value": "35" },
"retraction_speed": { "value": "35" },
"seam_overhang_angle": { "value": 30 },
"skin_edge_support_thickness": { "value": 0 },
"skin_material_flow": { "value": "material_flow" },
"skin_material_flow_layer_0": { "value": "material_flow * 0.95" },
"skin_monotonic": { "value": true },
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.25_um-abs_0.1mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_fan_speed_0 = 0
cool_min_layer_time = 4
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.25_um-petg_0.1mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.25_um-pla_0.1mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 6
gradual_flow_discretisation_step_size = 0.2
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.25_um-tough-pla_0.1mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 6
gradual_flow_discretisation_step_size = 0.2
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_tpu_0.15mm.inst.cfg
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Expand Up @@ -14,7 +14,6 @@ weight = -1
[values]
bridge_skin_material_flow = 200
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_material_flow = =bridge_skin_material_flow
bridge_wall_speed = 10
brim_width = 8.75
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_tpu_0.1mm.inst.cfg
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Expand Up @@ -14,7 +14,6 @@ weight = 0
[values]
bridge_skin_material_flow = 200
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_material_flow = =bridge_skin_material_flow
bridge_wall_speed = 10
brim_width = 8.75
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_tpu_0.2mm.inst.cfg
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Expand Up @@ -14,7 +14,6 @@ weight = -2
[values]
bridge_skin_material_flow = 200
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_material_flow = =bridge_skin_material_flow
bridge_wall_speed = 10
brim_width = 8.75
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-abs_0.06mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-abs_0.15mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-abs_0.1mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-abs_0.2mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-abs_0.3mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-petg_0.06mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-petg_0.15mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-petg_0.1mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-petg_0.2mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-petg_0.3mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 4
gradual_flow_discretisation_step_size = 0.2
Expand Down
1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-pla_0.06mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 6
gradual_flow_discretisation_step_size = 0.2
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1 change: 0 additions & 1 deletion resources/quality/ultimaker_s3/um_s3_aa0.4_um-pla_0.15mm.inst.cfg
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Expand Up @@ -22,7 +22,6 @@ acceleration_wall = =acceleration_infill
acceleration_wall_0 = 1500
acceleration_wall_x = =acceleration_wall
bridge_skin_speed = =bridge_wall_speed
bridge_sparse_infill_max_density = 50
bridge_wall_speed = 30
cool_min_layer_time = 6
gradual_flow_discretisation_step_size = 0.2
Expand Down
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