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_plane.py

@@ -3,6 +3,7 @@
 import bpy
 
 from ..common.nodes import prepare_node_group
+from ..common.material import inherit_material_slots
 
 
 IMAGE_PLANE_GROUP_NAME = "O Image Plane"
@@ -218,23 +219,8 @@ def build_image_plane_group():
     links.new(place_grid.outputs["Geometry"], geometry_switch.inputs["False"])
     links.new(place_cube.outputs["Geometry"], geometry_switch.inputs["True"])
 
-    capture_source = nodes.new("GeometryNodeCaptureAttribute")
-    capture_source.domain = "POINT"
-    capture_source.capture_items.clear()
-    capture_source.capture_items.new("BOOLEAN", "Source")
-    capture_source.inputs["Source"].default_value = True
-    links.new(geometry_input.outputs["Geometry"], capture_source.inputs["Geometry"])
-    join_material = nodes.new("GeometryNodeJoinGeometry")
-    links.new(geometry_switch.outputs["Output"], join_material.inputs["Geometry"])
-    links.new(capture_source.outputs["Geometry"], join_material.inputs["Geometry"])
-    set_material_index = nodes.new("GeometryNodeSetMaterialIndex")
-    set_material_index.inputs["Material Index"].default_value = 0
-    links.new(join_material.outputs["Geometry"], set_material_index.inputs["Geometry"])
-    delete_source = nodes.new("GeometryNodeDeleteGeometry")
-    delete_source.domain = "POINT"
-    links.new(set_material_index.outputs["Geometry"], delete_source.inputs["Geometry"])
-    links.new(capture_source.outputs["Source"], delete_source.inputs["Selection"])
-    links.new(delete_source.outputs["Geometry"], output.inputs["Geometry"])
+    geometry = inherit_material_slots(group, geometry_switch.outputs["Output"], geometry_input.outputs["Geometry"])
+    links.new(geometry, output.inputs["Geometry"])
 
     group.color_tag = "GEOMETRY"
     group.description = (