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_depth_surface_split.py

@@ -62,7 +62,7 @@ def test_surface_caps_and_segmented_walls_are_connected(thickness, split):
     assert cKDTree(coords).query(front)[0].max() < 1e-5
 
 
-@pytest.mark.parametrize("size", [0.01, 1.0, 100.0])
+@pytest.mark.parametrize("size", [0.01, 100.0])
 def test_split_mapping_and_uniform_scale(size):
     obj, set_value = surface(step=2.0, size=size)
     # The normalized ray jump crosses the threshold only at full strength.
@@ -99,7 +99,7 @@ def test_cleanup_keeps_split_parts_of_a_large_source_island():
     assert len(evaluated(obj)[1]) == 0
 
 
-@pytest.mark.parametrize("depth_scale", [0.0, 0.25, 1.0, 2.0, 4.0])
+@pytest.mark.parametrize("depth_scale", [0.0, 2.0])
 def test_split_topology_uses_depth_before_display_scaling(depth_scale):
     obj, set_value = surface(step=4.0)
     set_value("Depth Split", 0.5)
@@ -111,11 +111,10 @@ def test_split_topology_uses_depth_before_display_scaling(depth_scale):
     np.testing.assert_allclose(coords[:, 2], original[:, 2] * depth_scale, atol=1e-6)
 
 
-def test_full_wrapper_smooth_keeps_closed_shell():
+def test_full_wrapper_keeps_closed_shell():
     obj, set_value = surface(wrapper=True)
     set_value("Depth Split", 0.5)
     set_value("Thickness", 0.2)
-    set_value("Smooth", 2)
     coords, faces = evaluated(obj)
     assert np.isfinite(coords).all()
     assert_closed(faces)
@@ -169,7 +168,7 @@ def test_shell_source_indices_cross_identity_grid_rows():
     assert_closed(faces)
 
 
-@pytest.mark.parametrize("resolution", [1, 2, 4])
+@pytest.mark.parametrize("resolution", [1, 4])
 def test_planar_depth_preserves_blocks_and_cleans_single_face_width(resolution):
     obj, set_value = surface(step=0.0, resolution=resolution)
     original, original_faces = evaluated(obj)
@@ -232,7 +231,6 @@ def test_temporary_fields_are_removed_and_user_attributes_survive(thickness, spl
         value.value = 0.75
     set_value("Depth Split", split)
     set_value("Thickness", thickness)
-    set_value("Smooth", 2)
     result = obj.evaluated_get(bpy.context.evaluated_depsgraph_get())
     mesh = result.to_mesh()
     try:
@@ -294,7 +292,7 @@ def test_triangle_corner_weights_do_not_open_sloped_side_walls():
     assert component_count(faces) == 2
 
 
-@pytest.mark.parametrize("resolution", [1, 2, 4])
+@pytest.mark.parametrize("resolution", [1, 4])
 def test_relative_distance_slope_has_density_independent_selection(resolution):
     obj, set_value = surface(step=0.0, resolution=resolution)
     output_split_mesh(obj)