these are like eSsEnTiAL

they look something like this
[stolen from the great -wildfiree ]

on PicsArt just add it at the end of your cover → blend
then do overlay for a bright cover like this

and multiply for a dark cover. sometimes it gets toO dark so you can always adjust the opacity.

▶btw the resource book by -wildfiree is GRAPHIC HEAVEN. LIKE OMIGAWD YOUR LIFE WILL CHANGE

other AMAZING resource books you can find are by
▶ CoversGraphic
▶ GraphicInstitute