TV Shows - Icon Selection

[SoonerLater]

How can I select the icons which represent each TV show in my library? In this picture


photo hosted on Imgur

you can see that the icons for A.P. Bio, BNA, The Bold Type, Bridget & Eamon all are appropriate for those shows (nothing is cropped out). However, in the same picture, the icons for Aqua Teen Hunger Force, Attack on Titan, Barry, Better Things, Black-ish, Breaking Bad, Brooklyn Nine-nine and Casual are all cropped from a larger (probably landscape) image.

How can I replace the bad/cropped ones with more appropriate icon images?

[SoonerLater]

Partial Breakthrough:

Every TV show which has a problem Icon is creating the icon from a cropped version of the thumb.jpg which is in the root folder of the TV show.

Every TV show which shows an Icon which is acceptable, does not have a thumb.jpg, but either has a poster.jpg or no images at all in the root folder of the TV show.

I will play with this some more and report back.

[amet]

See here please, thumb is a fallback and ideally you would have a poster for the tvshow or a season poster in folder

https://wiki.mrmc.tv/index.php/Naming_Artwork_files

[SoonerLater]

I deleted all instances of thumb.jpg and then re-booted my Apple TV 4K. However, the artwork for TV shows showing is still all the thumb.jpgs. The root of every tv show has a poster.jpg, but all of the shows which previously had a thumb.jpg (now deleted) are still showing cached copies of the thumb.jpgs not the poster.jpgs. I am running MrMC 3.9-7 (GIT: 2020-05-24-1c39d56) on Apple TV 4K running TVOS 13.4.8 (kernel: Darwin 19.6.0).

Is there a way to get MRMC to refresh all available artwork?

[amet]

yes, settings-> appearance -> cached images -> regenerate thumbnails