Refactor image handling and update foreground processing

- Changed the logic in `remove_background_faces` to keep only faces with all foreground vertices.
- Updated background job to save foreground images with a new naming convention (`color.0001.png`).
- Replaced `copy_frames` with `copy_color_images` in various jobs to ensure consistent image naming.
- Introduced a new function `copy_color_images` to handle the copying of images with a specific naming format.
- Updated the BEN2 model to save output images with a new prefix for better clarity.
- Modified tests to reflect changes in image naming and processing logic.
- Added a new shadeless node group for improved material handling in geometry nodes.
- Enhanced validation scripts to check for new image naming conventions and ensure proper functionality.

tools/validate_depth_plane_asset.py

@@ -13,6 +13,8 @@ sys.path.insert(
 
 from snapform.blender.depth_plane import (
     DEPTH_PLANE_MATERIAL_NODE_GROUP_NAME,
+    MATERIAL_COLOR_SPACE,
+    SHADELESS_NODE_GROUP_NAME,
     SURFACE_MATERIAL_NODE_GROUP_NAME,
     add_depth_plane_processing,
     create_material,
@@ -133,7 +135,6 @@ def main():
         foreground,
         1.0,
         displacement_image=depth,
-        foreground_image=foreground,
     )
     mesh.materials.append(material)
     material_group = bpy.data.node_groups[DEPTH_PLANE_MATERIAL_NODE_GROUP_NAME]
@@ -232,6 +233,47 @@ def main():
         for node in material.node_tree.nodes
         if node.bl_idname == "ShaderNodeTexImage"
     )
+    shadeless_material = create_material(
+        "Shadeless",
+        foreground,
+        1.0,
+        shadeless=True,
+    )
+    shadeless_group = bpy.data.node_groups[SHADELESS_NODE_GROUP_NAME]
+    shadeless_nodes = [
+        node
+        for node in shadeless_material.node_tree.nodes
+        if node.bl_idname == "ShaderNodeGroup"
+        and node.node_tree == shadeless_group
+    ]
+    assert len(shadeless_nodes) == 1
+    assert not any(
+        node.bl_idname == "ShaderNodeEmission"
+        for node in shadeless_material.node_tree.nodes
+    )
+    assert [
+        item.name
+        for item in shadeless_group.interface.items_tree
+        if item.item_type == "SOCKET" and item.in_out == "INPUT"
+    ] == ["Color"]
+    assert [
+        item.name
+        for item in shadeless_group.interface.items_tree
+        if item.item_type == "SOCKET" and item.in_out == "OUTPUT"
+    ] == ["Shader"]
+    assert {
+        node.label: node.operation
+        for node in shadeless_group.nodes
+        if node.bl_idname == "ShaderNodeMath"
+    } == {
+        "Bounce Count": "SUBTRACT",
+        "Camera or Refracted": "SUBTRACT",
+        "Limit Reflections": "SUBTRACT",
+        "Camera Ray to Glossy": "MULTIPLY",
+        "Shadow or Reflection?": "MAXIMUM",
+        "Shadow, Reflect or Refract?": "MAXIMUM",
+    }
+    assert foreground.colorspace_settings.name == MATERIAL_COLOR_SPACE
     surface_material = create_material("Surface", foreground, 1.0)
     surface_group = bpy.data.node_groups[SURFACE_MATERIAL_NODE_GROUP_NAME]
     surface_group_nodes = [