2016-02-05, 11:25
Perhaps if the cache.artwork property is set, eg.:
then logically, while pruning, any artwork type that wouldn't otherwise be cached by c/C (because it's not in the cache.artwork list) should be removed during the prune - eg. clearart, logo, banner would all be pruned as they're not being cached by c/C, but poster, fanart, landscape, thumb and season.poster would be retained while pruning as they are being cached by c/C.
Code:
cache.artwork = poster, fanart, landscape, thumb, season.poster
then logically, while pruning, any artwork type that wouldn't otherwise be cached by c/C (because it's not in the cache.artwork list) should be removed during the prune - eg. clearart, logo, banner would all be pruned as they're not being cached by c/C, but poster, fanart, landscape, thumb and season.poster would be retained while pruning as they are being cached by c/C.