def METHOD_NAME():
    """Find a file name (but avoid overwriting)"""
    n = 0
    while n < 10000:
        fn = f"image{n:0>4d}.dds"
        tex = os.path.join(os.path.dirname(NifOp.props.filepath), fn)
        if not os.path.exists(tex):
            break
        n += 1
    return tex