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/support/image_objects.py

@@ -125,16 +125,12 @@ def _add_cutout_modifier(obj, shape):
         object_data.modifier_input_identifier(group, "Cleanup Threshold"),
         0.0,
     )
-    object_data.set_modifier_input(
-        modifier,
-        object_data.modifier_input_identifier(group, "Smooth Weight"),
-        0.0,
-    )
-    object_data.set_modifier_input(
-        modifier,
-        object_data.modifier_input_identifier(group, "Smooth"),
-        1,
-    )
+    if shape == "DEPTH_SOLID":
+        object_data.set_modifier_input(
+            modifier,
+            object_data.modifier_input_identifier(group, "Smooth Weight"),
+            0.0,
+        )
     return modifier
 
 
@@ -167,7 +163,6 @@ def _depth_surface_step_object():
         ("Uniform Scale", 1.0),
         ("Reference Depth", 1.0),
         ("Thickness", 0.0),
-        ("Smooth", 0),
     ):
         object_data.set_modifier_input(
             modifier,