Amazon Prime’s Undone is a show (although not ‘horror” it deals with many dark subjects) that is trippy, deep, and tackles the topic of trauma head on. It is visually incomparable and the technique they use to get their unique effects is by first filming the actors and then having their footage drawn over by animators. (This method is known as rotoscoping if you want to read more about it).
The star of the series, Rosa Salazar, is incredible in this. Her expressive face and large eyes, make all her actions almost enhanced and it is perfect for Undone. The show only consists of 8 episodes and they each come in at 22 minutes. (So be careful - it’s way too easy to watch the whole season in one night).