Refactor Cutout and Image Editing Logic

- Renamed "Base Plane Depth" to "Reference Depth" across validate_cutout.py for consistency.
- Introduced a new specification for Cutout mesh sampling to ensure source pixel spacing is preserved and limits are applied correctly.
- Unified naming conventions for image editing results to maintain consistency across Remove Background, Upscale, and Crop operations.
- Updated the handling of Refine Selection to ensure it retains the original bounds and does not apply unnecessary cropping.
- Enhanced material generation logic to connect image color directly to IOR Level, improving the rendering of dark areas.
- Established clear requirements for geometry depth controls and image result materials to ensure consistent behavior across different components.
- Removed outdated logic and ensured all changes are documented and tested for regression.

tools/node_assets/build_cutout.py

@@ -712,7 +712,7 @@ def build_node_group(shape):
         options = group.interface.new_panel(name="Options", default_closed=True)
         reference_depth = _float_input(
             group,
-            "Base Plane Depth",
+            "Reference Depth",
             1.0,
             0.0,
             None,
@@ -736,7 +736,7 @@ def build_node_group(shape):
         options = group.interface.new_panel(name="Options", default_closed=True)
         reference_depth = _float_input(
             group,
-            "Base Plane Depth",
+            "Reference Depth",
             1.0,
             0.0,
             None,
@@ -771,7 +771,7 @@ def build_node_group(shape):
             "Depth Image",
             "Depth Scale",
             "Uniform Scale",
-            "Base Plane Depth",
+            "Reference Depth",
             "Depth Direction",
         },
     )
@@ -796,7 +796,7 @@ def build_node_group(shape):
             controls.outputs["Uniform Scale"],
             controls.outputs["Depth Direction"],
             controls.outputs["Depth Image"],
-            controls.outputs["Base Plane Depth"],
+            controls.outputs["Reference Depth"],
         )
         output_location = (5100.0, 600.0)
     else:
@@ -806,7 +806,7 @@ def build_node_group(shape):
             controls.outputs["Thickness"],
             controls.outputs["Depth Scale"],
             controls.outputs["Uniform Scale"],
-            controls.outputs["Base Plane Depth"],
+            controls.outputs["Reference Depth"],
             controls.outputs["Depth Image"],
         )
         output_location = (8200.0, 400.0)
@@ -877,7 +877,7 @@ def build_cutout_modifier_group(shape_groups):
 
     reference_depth = _float_input(
         group,
-        "Base Plane Depth",
+        "Reference Depth",
         1.0,
         0.0,
         None,