I am pretty new to customtkinter and programming as a whole (im in university 1st year) and we need to create an interface. I am trying to round the corners of a button which is on top of an image which I use for the background. The problem is that when I round the corners the button widget cuts off the background image. I put the background color of the widget to be transparent but since it cuts off the screen it turns to black. I want to ask if there is a way to make it so the background doesnt cover the background image.

this is a the code, mind you its pretty simple and the variables are in spanish

 ventana = ctk.CTk()
    ventana.title("Proyecto Andrómeda")
    ventana.geometry("1920×1080")
    ventana.minsize(1920, 1080)
    ventana.attributes("-fullscreen", True)

    # Cargar la imagen de fondo
    fondo_image = Image.open("fondo_inicio.png")
    fondo_photo = ctk.CTkImage(light_image = fondo_image, dark_image = fondo_image, size = (1560, 865))
    
    # Crear un Label y poner la imagen de fondo
    label = ctk.CTkLabel(ventana, image = fondo_photo, text = "")
    label.pack(fill = "both", expand = True)
    
    # Crear botón de iniciar
    boton_image = Image.open("boton_iniciar.png")
    boton_photo = ctk.CTkImage(light_image = boton_image, dark_image = boton_image, size = (300, 100))
    iniciar_boton = ctk.CTkButton(ventana, command = iniciar_app, image = boton_photo, text = "", fg_color = "#A570AF", corner_radius = 0, hover_color = "#94649D")
    iniciar_boton.place(relx = 0.5, rely = 0.5, anchor = "center")