CreateInstancesOfSelectedMaterial.py

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# | '_ ` _ \ / _` | '_ ` _ \ / _ \| '_ \| |/ _ \ '_ ` _ \
# | | | | | | (_| | | | | | | (_) | | | | |  __/ | | | | |
# |_| |_| |_|\__,_|_| |_| |_|\___/|_| |_|_|\___|_| |_| |_|
#					www.mamoniem.com
#					  www.ue4u.xyz
#Copyright 2022 Muhammad A.Moniem (@_mamoniem). All Rights Reserved.
#

import unreal

#Set the instances count needed
totalRequiredInstances = 10

#General variables, will be auto set
newAssetName = ""
sourceAssetPath = ""
createdAssetsPath = ""

@unreal.uclass()
class EditorUtil(unreal.GlobalEditorUtilityBase):
    pass

@unreal.uclass()
class MaterialEditingLib(unreal.MaterialEditingLibrary):
    pass

editorUtil = EditorUtil()
materialEditingLib = MaterialEditingLib()

selectedAssets = editorUtil.get_selected_assets()

factory = unreal.MaterialInstanceConstantFactoryNew()

asset_tools = unreal.AssetToolsHelpers.get_asset_tools()

for selectedAsset in selectedAssets:
    newAssetName = selectedAsset.get_name() + "_%s_%d"
    sourceAssetPath = selectedAsset.get_path_name()

    createdAssetsPath = sourceAssetPath.replace(selectedAsset.get_name(), "-")
    createdAssetsPath = createdAssetsPath.replace("-.-", "")


    for x in range(totalRequiredInstances):

        newAsset = asset_tools.create_asset(newAssetName %("inst", x+1), createdAssetsPath, None, factory)

        materialEditingLib.set_material_instance_parent(newAsset, selectedAsset)