add phone screen material and fix asset cooking

Scripts/create_phone_material.py

@@ -0,0 +1,67 @@
+# Unreal Editor Python script to create the Mosis phone screen material
+# Run this in the Editor: File > Execute Python Script
+# Or from Python console: exec(open('Scripts/create_phone_material.py').read())
+
+import unreal
+
+def create_phone_screen_material():
+    """Create an unlit emissive material for displaying the phone screen."""
+
+    asset_tools = unreal.AssetToolsHelpers.get_asset_tools()
+    material_factory = unreal.MaterialFactoryNew()
+
+    # Create the material asset
+    material_path = "/Game/Mosis/Materials"
+    material_name = "M_PhoneScreen"
+
+    # Check if material already exists
+    if unreal.EditorAssetLibrary.does_asset_exist(f"{material_path}/{material_name}"):
+        unreal.log_warning(f"Material {material_name} already exists, skipping creation")
+        return unreal.load_asset(f"{material_path}/{material_name}")
+
+    # Create the material
+    material = asset_tools.create_asset(
+        material_name,
+        material_path,
+        unreal.Material,
+        material_factory
+    )
+
+    if not material:
+        unreal.log_error("Failed to create material")
+        return None
+
+    # Configure material properties for phone screen display
+    material.set_editor_property("shading_model", unreal.MaterialShadingModel.MSM_UNLIT)
+    material.set_editor_property("blend_mode", unreal.BlendMode.BLEND_OPAQUE)
+    material.set_editor_property("two_sided", False)
+
+    # Get the material editor subsystem to add nodes
+    mel = unreal.MaterialEditingLibrary
+
+    # Create texture parameter node
+    texture_param = mel.create_material_expression(
+        material,
+        unreal.MaterialExpressionTextureSampleParameter2D,
+        -400, 0
+    )
+    texture_param.set_editor_property("parameter_name", "PhoneScreen")
+
+    # Connect texture RGB to emissive color
+    mel.connect_material_property(
+        texture_param, "RGB",
+        unreal.MaterialProperty.MP_EMISSIVE_COLOR
+    )
+
+    # Recompile the material
+    mel.recompile_material(material)
+
+    # Save the asset
+    unreal.EditorAssetLibrary.save_asset(f"{material_path}/{material_name}")
+
+    unreal.log(f"Created material: {material_path}/{material_name}")
+    return material
+
+
+if __name__ == "__main__":
+    create_phone_screen_material()