This Lora turns the background into a green screen to facilitate compositing in video editing software like After Effects. Remove any tags related to the background from the prompt. I recommend using tags like 'green background'. The recommended weight is 1.5.
To make the background a green screen with more certainty, you can put a green image in an Img2Img or ControlNet Tille (low weight, short ending Control Step).
This Lora is useful for generating characters and backgrounds separately using AnimateDiff and then compositing them together.
The method I used to create this Lora can be found here.