feat(cutout): implement boundary padding for cutout textures

- Introduced a new `Boundary Padding` preference in the Cutout Tool with a default of 2 px and a configurable range of 1-4 px.
- Updated the Cutout client to establish inward mapping from the final Mask, sampling in a fixed direction and processing independent material RGBA and Depth.
- Enhanced the handling of RGBA and Depth during cutout operations, ensuring proper mapping and preservation of source data.
- Added tests to validate the new boundary padding functionality and its integration with existing cutout processes.

feat(geometry): remove overall mesh smoothing from geometry nodes

- Removed the `Smooth` input from several geometry node groups to eliminate unnecessary overall mesh smoothing.
- Retained `Smooth Weight` for depth nodes while removing it from Cutout and Relief Plane nodes.
- Ensured that boundary, normal, and fill smoothing behaviors remain intact and consistent.
- Updated tests and documentation to reflect the changes in node interfaces and behaviors.

feat(normals): scale tangent normals with depth

- Reused the existing `o_normal_reduction` attribute to adjust Tangent Normal strength based on the geometry's `Depth Scale`.
- Ensured that Tangent Normal strength is consistent with the geometry depth, preserving full strength for materials that do not provide the attribute.
- Updated tests to verify the correct behavior of normal strength adjustments in both Tangent and Object Space.

tests/tools/nodes/test_boundary_smoothing.py

@@ -52,7 +52,8 @@ def edge_band(faces, seeds, rings=2):
     return selected
 
 
-def test_cutout_split_and_outline_use_distinct_influence():
+@pytest.mark.parametrize(("outline_scale", "expected_outline"), [(0.1, 0.1), (1.0, 1.0)])
+def test_split_gets_full_influence_and_outline_uses_configured_scale(outline_scale, expected_outline):
     bpy.ops.wm.read_factory_settings(use_empty=True)
     points, faces, split = [], [], []
     for side in range(2):
@@ -87,7 +88,10 @@ def test_cutout_split_and_outline_use_distinct_influence():
     store.data_type, store.domain = "FLOAT", "POINT"
     store.inputs["Name"].default_value = "test_influence"
     group.links.new(source.outputs["Geometry"], store.inputs["Geometry"])
-    group.links.new(cut_boundary_influence(group, split_attribute.outputs["Attribute"]), store.inputs["Value"])
+    group.links.new(
+        cut_boundary_influence(group, split_attribute.outputs["Attribute"], outline_scale=outline_scale),
+        store.inputs["Value"],
+    )
     output = group.nodes.new("NodeGroupOutput")
     group.links.new(store.outputs["Geometry"], output.inputs["Geometry"])
     obj.modifiers.new("Boundary influence", "NODES").node_group = group
@@ -97,7 +101,7 @@ def test_cutout_split_and_outline_use_distinct_influence():
         influence = np.array([value.value for value in result.attributes["test_influence"].data])
     finally:
         evaluated_obj.to_mesh_clear()
-    np.testing.assert_allclose(influence[4 * 5], 0.1, atol=1e-6)
+    np.testing.assert_allclose(influence[4 * 5], expected_outline, atol=1e-6)
     np.testing.assert_allclose(influence[4 * 5 + 4], 1.0, atol=1e-6)
     np.testing.assert_allclose(influence[4], 1.0, atol=1e-6)