Add new tests and functionality for image processing and geometry handling

- Introduced color_image.py for preparing standalone color images for tests.
- Added hdr_image.py to create HDR textures for testing.
- Implemented test_image_depth_panorama.py to evaluate panorama topology, UVs, and depth discontinuities.
- Created test_shadeless.py to validate the opacity and HDR color endpoints of the Shadeless group.
- Developed moge3_export.py for exporting dynamic MoGe-3 backbone and ONNX graphs.
- Added material.py to inherit material slots onto generated geometry.
- Built image_depth_panorama.py to construct a quad panorama with depth separation and sampling.

tools/nodes/groups/image_depth_plane.py

@@ -7,7 +7,7 @@ from ..common.nodes import prepare_node_group, float_input
 from ..common.smoothing import expand_smooth
 from ..common.depth_surface import (
     project_depth_surface, thicken_depth_surface, remove_surface_attributes,
-    split_depth_surface, store_surface_camera,
+    split_depth_surface, sample_face_camera, store_surface_camera,
 )
 
 DEPTH_PLANE_NODE_GROUP_NAME = "O Image Depth Plane"
@@ -63,7 +63,7 @@ def build_image_depth_plane_group(image_plane_group):
     smooth_weight.min_value, smooth_weight.max_value = 0.0, 1.0
     smooth_weight.subtype = "FACTOR"
     validity_threshold = _interface_socket(group, "Validity Threshold", "INPUT", "NodeSocketFloat", parent=options)
-    validity_threshold.default_value = 0.9
+    validity_threshold.default_value = 0.1
     validity_threshold.min_value, validity_threshold.max_value = 0.0, 1.0
     validity_threshold.subtype = "FACTOR"
     data = group.interface.new_panel(name="Data", default_closed=True)
@@ -111,13 +111,10 @@ def build_image_depth_plane_group(image_plane_group):
     invalid.data_type, invalid.operation = "FLOAT", "LESS_THAN"
     links.new(threshold_input.outputs["Validity Threshold"], invalid.inputs["B"])
     links.new(channels.outputs["Alpha"], invalid.inputs["A"])
-    points = nodes.new("GeometryNodeFieldOnDomain")
-    points.data_type, points.domain = "BOOLEAN", "POINT"
-    links.new(invalid.outputs["Result"], points.inputs["Value"])
     delete = nodes.new("GeometryNodeDeleteGeometry")
     delete.domain, delete.mode = "FACE", "ALL"
     links.new(plane.outputs["Geometry"], delete.inputs["Geometry"])
-    links.new(points.outputs["Value"], delete.inputs["Selection"])
+    links.new(invalid.outputs["Result"], delete.inputs["Selection"])
     cull_controls = _group_input(nodes, {"Valid Only"})
     cull = nodes.new("GeometryNodeSwitch")
     cull.input_type = "GEOMETRY"
@@ -126,7 +123,7 @@ def build_image_depth_plane_group(image_plane_group):
     links.new(plane.outputs["Geometry"], cull.inputs["False"])
     split_input = _group_input(nodes, {"Split Threshold"})
     geometry = split_depth_surface(
-        group, cull.outputs["Output"], texture_input.outputs["Depth Image"],
+        group, cull.outputs["Output"], sample_face_camera(group, texture_input.outputs["Depth Image"]),
         split_input.outputs["Split Threshold"], scale_input.outputs["Uniform Scale"],
     )
     geometry, camera = store_surface_camera(