How to add wallpaper background to this theme?

[Shredder5262]

I want to add my own background instead of it being just plain black....how can i do that?

[Null-Mind]

in the themes/metro/metro.yaml file

remove

lovelace-background: var(--primary-background-color)

and this way you can use any background you like

[madjetey]

How about light / dark mode backgrounds? Tried replacing lovelace-background: var(--primary-background-color) with lovelace-background: var(--background-image) and put background-image: "center / cover no-repeat fixed url('/local/Metro_night.svg')" under every light/dark mode entry I could fine (common, blue, red, etc). It's not working as hoped

UPDATE:
This worked. It wasn't rendering because I didn't restart HA after making the changes. Wrongly thought cache clearing would be enough. Now got animated SVGs as backgrounds for light & dark modes.