create_artifact_tapestry_effect

create_artifact_tapestry_effect = {
	# Get the character the artifact is being made for.
	$OWNER$ = { save_scope_as = owner }
	$WEAVER$ = { save_scope_as = weaver }
	save_adventurer_location_effect = yes

	hidden_effect_new_object = {
		# Get artifact quality, wealth, and materials
		get_artifact_quality_effect = yes
		get_artifact_wealth_effect = yes
		if = { #If the scene has been set in events we save it on the owner here so we can access it when choosing features
			limit = { exists = scope:tapestry_scene	}
			scope:owner = {
				set_variable = {
					name = artifact_tapestry_scene
					value = scope:tapestry_scene
					days = 1
				}
			}
		}
		# Fallback
		else = {
			random_list = {
				10 = {
					scope:owner = {
						set_variable = {
							name = artifact_tapestry_scene
							value = flag:geometric_patterns
							days = 1
						}
					}
				}
				10 = {
					scope:owner = {
						set_variable = {
							name = artifact_tapestry_scene
							value = flag:garden
							days = 1
						}
					}
				}
				10 = {
					scope:owner = {
						set_variable = {
							name = artifact_tapestry_scene
							value = flag:bucolic
							days = 1
						}
					}
				}
			}
		}
		# Create the artifact
		scope:owner = {
			if = {
				limit = {
					exists = scope:inspiration_owner
				}
				create_artifact = {	
					name = artifact_wall_tapestry_name
					description = placeholder # Will be regenerated in the post-creation effects
					creator = scope:weaver
					visuals = tapestry
					type = tapestry
					modifier = artifact_placeholder_modifier
					save_scope_as = newly_created_artifact
					wealth = scope:wealth
					quality = scope:quality
					#decaying = no
				}
			}
			else_if = {
				limit = {
					exists = scope:adventurer
				}
				create_artifact = {	
					name = artifact_wall_tapestry_name
					description = placeholder # Will be regenerated in the post-creation effects
					creator = scope:adventurer
					visuals = tapestry
					type = tapestry
					modifier = artifact_placeholder_modifier
					save_scope_as = newly_created_artifact
					wealth = scope:wealth
					quality = scope:quality
					#decaying = no
					history = {
						location = scope:location
						actor = scope:adventurer
						recipient = root
						type = discovered
					}
				}
			}
			else = {
				create_artifact = {	
					name = artifact_wall_tapestry_name
					description = placeholder # Will be regenerated in the post-creation effects
					creator = scope:weaver
					visuals = tapestry
					type = tapestry
					modifier = artifact_placeholder_modifier
					save_scope_as = newly_created_artifact
					wealth = scope:wealth
					quality = scope:quality
					#decaying = no
				}
			}
		}
		scope:newly_created_artifact = {
			set_artifact_description = artifact_wall_tapestry_description
			# Set grandeur
			add_scaled_artifact_modifier_grandeur_big_effect = yes
			
			if = {
				limit = {
					has_artifact_feature = tapestry_scene_religious
				}
				add_scaled_artifact_modifier_piety_effect = yes
			}

As written in game/common/scripted_effects/01_ep1_court_artifact_creation_effects.txt.