Sims4 Extend fbx Texture to ingame format

extend_texture_(1024_2048)Sims4 (non send to, interactive cmd):
--------------------------------------------------------------

extend_texture_(1024_2048)Sims4
---

@echo off
echo Drag and drop the OLD texture file here, then press Enter:
set /p OLD_TEX=
echo Drag and drop the NEW (extended) texture file here, then press Enter:
set /p NEW_TEX=
echo Drag and drop the FBX file here, then press Enter:
set /p FBX_FILE=
:: Path to Blender executable
set "BLENDER_EXE=C:\portableapps\blender36\blender.exe"
:: Run Blender in background with Python script
"%BLENDER_EXE%" --background --python replace_fbx_texture_blender.py -- "%FBX_FILE%" "%OLD_TEX%" "%NEW_TEX%"
pause



replace_fbx_texture_blender.py
---

import bpy
import sys
import os
argv = sys.argv
argv = argv[argv.index("--") + 1:]  # arguments after --
if len(argv) != 3:
    print("Usage: blender --background --python replace_fbx_texture_blender.py -- FBX_FILE OLD_TEX NEW_TEX")
    sys.exit(1)
fbx_path = os.path.abspath(argv[0])
old_tex_path = os.path.abspath(argv[1])
new_tex_path = os.path.abspath(argv[2])
bpy.ops.wm.read_factory_settings(use_empty=True)
bpy.ops.import_scene.fbx(filepath=fbx_path)
for mat in bpy.data.materials:
    if mat.node_tree:
        for node in mat.node_tree.nodes:
            if node.type == 'TEX_IMAGE' and node.image:
                img_path = bpy.path.abspath(node.image.filepath)
                if os.path.normcase(img_path) == os.path.normcase(old_tex_path):
                    print(f"Replacing texture in material: {mat.name}")
                    node.image.filepath = new_tex_path
                    node.image.reload()
# Original old texture size
old_w, old_h = 519, 507
# New extended texture size
new_w, new_h = 1024, 2048

scale_x = old_w / new_w
scale_y = old_h / new_h
offset_x = 0
offset_y = 1 - scale_y  # top-left corner

for obj in bpy.data.objects:
    if obj.type == 'MESH':
        mesh = obj.data
        for uv_layer in mesh.uv_layers:
            for uv in uv_layer.data:
                # Scale and offset UV
                uv.uv.x = uv.uv.x * scale_x + offset_x
                uv.uv.y = uv.uv.y * scale_y + offset_y
fbx_dir, fbx_name = os.path.split(fbx_path)
new_fbx_name = os.path.splitext(fbx_name)[0] + "_new.fbx"
new_fbx_path = os.path.join(fbx_dir, new_fbx_name)

bpy.ops.export_scene.fbx(filepath=new_fbx_path, embed_textures=False)
print(f"Saved new FBX to: {new_fbx_path}")