Background: image

Hi! I am
Trying to get nice night theme and background image would work pretty good. I know one way to do that - use lovelace. But in that scenario, image would stay if I change the theme.

Is there an another way to have background image?
Or how to change lovelace code by changing theme?

All I want to see is usual UI with white background color and some image with night mode.

Isn’t this issue easy solvable?