I'm sorry for posting without understanding the rules.
Thank you for your response.
I tried using this script, but it's not working properly. Could someone help me fix it?

import c4d
from c4d import utils

def apply_optimal_cubic_uv(obj, doc):
    if obj.GetType() == c4d.Opolygon:
        # UVWタグがなければ作成
        if not obj.GetTag(c4d.Tuvw):
            uvw_tag = c4d.UVWTag(obj.GetPolygonCount())
            obj.InsertTag(uvw_tag)

        # オブジェクトを選択
        doc.SetActiveObject(obj, c4d.SELECTION_NEW)

        # 最適化されたキュービックUVマッピングを適用
        settings = c4d.BaseContainer()
        settings[c4d.OPTIMALMAPPING_PRESERVEORIENTATION] = True  # 向きを保持
        settings[c4d.OPTIMALMAPPING_STRETCHTOFIT] = False  # ストレッチフィット
        settings[c4d.OPTIMALMAPPING_TWOD] = False  # 2D最適化
        settings[c4d.OPTIMALMAPPING_AREAFAK] = 0.0
        settings[c4d.OPTIMALMAPPING_RELAXCOUNT] = 0  # リラックス回数
        settings[c4d.OPTIMALMAPPING_SPACING] = 0.02  # スペーシング


        res = c4d.modules.bodypaint.CallUVCommand(points,
        pointCount,
        polys,
        polyCount,
        uvw,
        polySelection,
        pointSelection,
        op=settings,
        handle.GetMode(),
        cmdid,
        settings)
            #command=c4d.UVCOMMAND_OPTIMALCUBICMAPPING,
            #list=[obj],
            #mode=c4d.MODELINGCOMMANDMODE_ALL,
            #bc=settings,
            #doc=doc
        

        if not res:
            print("Failed to apply optimal cubic mapping to {}".format(obj.GetName()))

def main():
    doc = c4d.documents.GetActiveDocument()
    if not doc:
        return

    doc.StartUndo()

    objects = doc.GetObjects()  # シーン内の全オブジェクトを取得
    for obj in objects:
        apply_optimal_cubic_uv(obj, doc)

    doc.EndUndo()
    c4d.EventAdd()

if __name__ == "__main__":
    main()

@m_adam
Hi！
I'm trying to apply UVW mapping to child objects of an FBX file imported into Cinema 4D using this script.
While I can assign UVW coordinates, the automatic cubic UV unwrapping isn't working. Can you advise on what modifications are needed to achieve this?

import c4d
from c4d import utils

def apply_optimal_cubic_uv(obj, doc):
    if obj.GetType() == c4d.Opolygon:
        # UVWタグがなければ作成
        if not obj.GetTag(c4d.Tuvw):
            uvw_tag = c4d.UVWTag(obj.GetPolygonCount())
            obj.InsertTag(uvw_tag)

        # オブジェクトを選択
        doc.SetActiveObject(obj, c4d.SELECTION_NEW)

        # 最適化されたキュービックUVマッピングを適用
        settings = c4d.BaseContainer()
        settings[c4d.OPTIMALMAPPING_PRESERVEORIENTATION] = True  # 向きを保持
        settings[c4d.OPTIMALMAPPING_STRETCHTOFIT] = False  # ストレッチフィット
        settings[c4d.OPTIMALMAPPING_TWOD] = False  # 2D最適化
        settings[c4d.OPTIMALMAPPING_AREAFAK] = 0.0
        settings[c4d.OPTIMALMAPPING_RELAXCOUNT] = 0  # リラックス回数
        settings[c4d.OPTIMALMAPPING_SPACING] = 0.02  # スペーシング
        

        res = utils.SendModelingCommand(
            command=c4d.UVCOMMAND_OPTIMALCUBICMAPPING,
            list=[obj],
            mode=c4d.MODELINGCOMMANDMODE_ALL,
            bc=settings,
            doc=doc
        )

        if not res:
            print("Failed to apply optimal cubic mapping to {}".format(obj.GetName()))

def main():
    doc = c4d.documents.GetActiveDocument()
    if not doc:
        return

    doc.StartUndo()

    objects = doc.GetObjects()  # シーン内の全オブジェクトを取得
    for obj in objects:
        apply_optimal_cubic_uv(obj, doc)

    doc.EndUndo()
    c4d.EventAdd()

if __name__ == "__main__":
    main()