Adding to courts?

Hi. I'm sort of new to modding, I've created some jerseys, courts, etc., for a project I'm working on, and I've got a quick question: If I wanted to add logos to courts, how (if I even can) would I be able to do this? I know how to edit existing court logos, backboards, stadium logos, etc., but what I mean is like how the NBA puts playoff logos on the court during the postseason.

Thanks for taking the time to read this.

we cant add anything more to the courts than what is already there, but for the playoff file it is in something like the envcommon.viv file