"--background #000000" colors the entire page outside the images, black. Which would waste my printer Ink.

[diox8tony]

I was hoping the --background flag would color only the small white gaps, between photos. (curved card corners would become rectangular)

Such that every card appears rectangular, without changing size.

(i see the previous issue from May 2024, Sorry if this entirely duplicate, but I thought this was slightly different issue)

Maybe this is not a change to --background , but a new flag entirely.

[DiddiZ]

There is a pull request (#21 ) for this.
Consideration would be to use the actual border color of the cards, as scryfall provides this.