feat(editor): add bundled 3D prop models and sample picker in Creator Studio

scripts/editor/ui/palette_panel.gd

@@ -92,11 +92,40 @@ func _setup_import_ui() -> void:
 	path_row.add_child(_model_path_edit)
 
 	_btn_browse = Button.new()
-	_btn_browse.text = "..."
+	_btn_browse.text = "Browse..."
 	_btn_browse.pressed.connect(_on_browse_pressed)
 	path_row.add_child(_btn_browse)
 	_import_panel.add_child(path_row)
 
+	var sample_row := HBoxContainer.new()
+	var sample_lbl := Label.new()
+	sample_lbl.text = "Sample:"
+	sample_lbl.custom_minimum_size = Vector2(50, 0)
+	sample_row.add_child(sample_lbl)
+
+	var sample_option := OptionButton.new()
+	sample_option.add_item("— Pick a sample model —", 0)
+	sample_option.add_item("Treasure Chest", 1)
+	sample_option.set_item_metadata(1, {"path": "res://assets/props/chest.glb", "name": "Treasure Chest"})
+	sample_option.add_item("Pine Tree", 2)
+	sample_option.set_item_metadata(2, {"path": "res://assets/props/tree_pine_01.glb", "name": "Pine Tree"})
+	sample_option.add_item("Lamp Post", 3)
+	sample_option.set_item_metadata(3, {"path": "res://assets/props/lamp_post_01.glb", "name": "Lamp Post"})
+	sample_option.add_item("Buffalo Chip Coin", 4)
+	sample_option.set_item_metadata(4, {"path": "res://assets/props/buffalo_chip_coin.glb", "name": "Buffalo Chip Coin"})
+	sample_option.add_item("Small Crate", 5)
+	sample_option.set_item_metadata(5, {"path": "res://assets/props/crate_small.glb", "name": "Small Crate"})
+	sample_option.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+	sample_option.item_selected.connect(func(idx: int):
+		if idx > 0:
+			var meta: Dictionary = sample_option.get_item_metadata(idx)
+			_model_path_edit.text = meta.get("path", "")
+			if _model_name_edit.text.strip_edges().is_empty():
+				_model_name_edit.text = meta.get("name", "")
+	)
+	sample_row.add_child(sample_option)
+	_import_panel.add_child(sample_row)
+
 	_import_status_label = Label.new()
 	_import_status_label.text = ""
 	_import_status_label.add_theme_font_size_override("font_size", 10)

scripts/generate_props.gd

@@ -0,0 +1,152 @@
+extends SceneTree
+
+func _initialize() -> void:
+	_generate()
+
+func _save_model(root_node: Node3D, out_path: String) -> void:
+	var gltf := GLTFDocument.new()
+	var state := GLTFState.new()
+	var err := gltf.append_from_scene(root_node, state)
+	if err == OK:
+		var dir := out_path.get_base_dir()
+		DirAccess.make_dir_recursive_absolute(ProjectSettings.globalize_path(dir))
+		var w_err := gltf.write_to_filesystem(state, out_path)
+		print("Saved %s: error=%d" % [out_path, w_err])
+	else:
+		printerr("Failed append_from_scene for %s: %d" % [out_path, err])
+
+func _generate() -> void:
+	print("Generating prop models...")
+
+	# 1. Crate Small
+	var crate_root := Node3D.new()
+	var crate_mesh := MeshInstance3D.new()
+	var box := BoxMesh.new()
+	box.size = Vector3(1.0, 1.0, 1.0)
+	var mat_wood := StandardMaterial3D.new()
+	mat_wood.albedo_color = Color(0.6, 0.4, 0.2)
+	mat_wood.roughness = 0.8
+	box.material = mat_wood
+	crate_mesh.mesh = box
+	crate_mesh.position.y = 0.5
+	crate_root.add_child(crate_mesh)
+	_save_model(crate_root, "res://assets/props/crate_small.glb")
+
+	# 2. Rock
+	var rock_root := Node3D.new()
+	var rock_mesh := MeshInstance3D.new()
+	var sphere := SphereMesh.new()
+	sphere.radius = 0.6
+	sphere.height = 0.9
+	sphere.radial_segments = 8
+	sphere.rings = 6
+	var mat_rock := StandardMaterial3D.new()
+	mat_rock.albedo_color = Color(0.45, 0.45, 0.48)
+	mat_rock.roughness = 0.9
+	sphere.material = mat_rock
+	rock_mesh.mesh = sphere
+	rock_mesh.position.y = 0.45
+	rock_root.add_child(rock_mesh)
+	_save_model(rock_root, "res://assets/props/rock_01.glb")
+
+	# 3. Pine Tree
+	var tree_root := Node3D.new()
+	var trunk := MeshInstance3D.new()
+	var trunk_mesh := CylinderMesh.new()
+	trunk_mesh.top_radius = 0.15
+	trunk_mesh.bottom_radius = 0.2
+	trunk_mesh.height = 1.0
+	var mat_trunk := StandardMaterial3D.new()
+	mat_trunk.albedo_color = Color(0.38, 0.25, 0.12)
+	mat_trunk.roughness = 0.9
+	trunk_mesh.material = mat_trunk
+	trunk.mesh = trunk_mesh
+	trunk.position.y = 0.5
+	tree_root.add_child(trunk)
+
+	var foliage := MeshInstance3D.new()
+	var cone_mesh := CylinderMesh.new()
+	cone_mesh.top_radius = 0.0
+	cone_mesh.bottom_radius = 0.9
+	cone_mesh.height = 1.8
+	var mat_leaf := StandardMaterial3D.new()
+	mat_leaf.albedo_color = Color(0.15, 0.45, 0.2)
+	mat_leaf.roughness = 0.7
+	cone_mesh.material = mat_leaf
+	foliage.mesh = cone_mesh
+	foliage.position.y = 1.8
+	tree_root.add_child(foliage)
+	_save_model(tree_root, "res://assets/props/tree_pine_01.glb")
+
+	# 4. Lamp Post
+	var lamp_root := Node3D.new()
+	var pole := MeshInstance3D.new()
+	var pole_mesh := CylinderMesh.new()
+	pole_mesh.top_radius = 0.05
+	pole_mesh.bottom_radius = 0.08
+	pole_mesh.height = 2.4
+	var mat_metal := StandardMaterial3D.new()
+	mat_metal.albedo_color = Color(0.2, 0.22, 0.25)
+	mat_metal.metallic = 0.8
+	mat_metal.roughness = 0.3
+	pole_mesh.material = mat_metal
+	pole.mesh = pole_mesh
+	pole.position.y = 1.2
+	lamp_root.add_child(pole)
+
+	var light_mesh := MeshInstance3D.new()
+	var light_box := BoxMesh.new()
+	light_box.size = Vector3(0.3, 0.35, 0.3)
+	var mat_glow := StandardMaterial3D.new()
+	mat_glow.albedo_color = Color(1.0, 0.9, 0.4)
+	mat_glow.emission_enabled = true
+	mat_glow.emission = Color(1.0, 0.85, 0.3)
+	mat_glow.emission_energy_multiplier = 2.0
+	light_box.material = mat_glow
+	light_mesh.mesh = light_box
+	light_mesh.position.y = 2.4
+	lamp_root.add_child(light_mesh)
+	_save_model(lamp_root, "res://assets/props/lamp_post_01.glb")
+
+	# 5. Treasure Chest
+	var chest_root := Node3D.new()
+	var chest_body := MeshInstance3D.new()
+	var cbox := BoxMesh.new()
+	cbox.size = Vector3(0.9, 0.6, 0.6)
+	var mat_chest := StandardMaterial3D.new()
+	mat_chest.albedo_color = Color(0.45, 0.26, 0.12)
+	mat_chest.roughness = 0.6
+	cbox.material = mat_chest
+	chest_body.mesh = cbox
+	chest_body.position.y = 0.3
+	chest_root.add_child(chest_body)
+
+	var latch := MeshInstance3D.new()
+	var latch_box := BoxMesh.new()
+	latch_box.size = Vector3(0.12, 0.15, 0.06)
+	var mat_gold := StandardMaterial3D.new()
+	mat_gold.albedo_color = Color(0.95, 0.8, 0.2)
+	mat_gold.metallic = 0.9
+	mat_gold.roughness = 0.2
+	latch_box.material = mat_gold
+	latch.mesh = latch_box
+	latch.position = Vector3(0, 0.35, 0.31)
+	chest_root.add_child(latch)
+	_save_model(chest_root, "res://assets/props/chest.glb")
+
+	# 6. Buffalo Chip Coin
+	var coin_root := Node3D.new()
+	var coin_mesh := MeshInstance3D.new()
+	var cyl := CylinderMesh.new()
+	cyl.top_radius = 0.35
+	cyl.bottom_radius = 0.35
+	cyl.height = 0.08
+	cyl.material = mat_gold
+	coin_mesh.mesh = cyl
+	coin_mesh.rotation_degrees = Vector3(90, 0, 0)
+	coin_mesh.position.y = 0.4
+	coin_root.add_child(coin_mesh)
+	_save_model(coin_root, "res://assets/props/buffalo_chip_coin.glb")
+
+	print("All prop models generated!")
+	quit(0)

scripts/static_object_node.gd

@@ -95,6 +95,7 @@ func _try_load_asset(asset_id: String) -> Node:
 	# 2. Try direct path or custom asset path
 	var candidate_paths: Array[String] = [
 		asset_id,
+		"res://assets/%s" % asset_id,
 		"user://custom_assets/%s" % asset_id,
 		"user://custom_assets/%s" % asset_id.get_file()
 	]

scripts/verify_export_contents.gd

@@ -16,6 +16,7 @@ const PACK_PATH := "res://.export_check.pck"
 ## resources (so they only get packed via export_presets include_filter).
 const REQUIRED := [
 	"res://assets/avatars/catalog.json",
+	"res://assets/editor/object_catalog.json",
 ]
 
 ## A resource we know should be there, as a sanity check that the pack loaded.