Thumbnail parent folder

[Nutul]

Hi all
I have a question about the options for displaying thumbnails.
I'll give an example, so I think I'll be understood more easily.
I have this folder:
1988 - Operation Mindcrime (2006 Remastered 2cd)
Inside this folder there are two folders:
cd1
cd2
I put my thumbnail inside cd1 and cd2 and they appear correctly in the list.
The "1988 - Operation Mindcrime (2006 Remastered 2cd)" folder, even if I put a thumbnail inside it, I see it with a generic white icon.
Is there a way to see the thumbnail of the parent folder as well?
Thank you
v.

Hi,

the thumbnails are related to the audio files, and they are searched for in the folder containing such files. Here you have a folder containing folders, so no image is expected, nor searched there.