Spend the most of my day on twitter today 😅 but I've managed to implement a background overlay feature to graphics generated with https://uselessshit.co/card-generator

Here's the outcome:

https://i.ibb.co/7bJgXSN/custom-card-29.png
https://i.ibb.co/XzXck53/custom-card-30.png
https://i.ibb.co/7tdP5G2/custom-card-31.png