So, for a game, I want to fade everything thats not being recurrently drawn (such as a character) to black. You can see the effect here, in PICO Space. How would I go about doing this?

you will need to define some palettes to replace colours with darker colours then all black.

docs for the pal function: https://www.lexaloffle.com/dl/docs/pico-8_manual.html#PAL
tool to make a palette: https://www.lexaloffle.com/bbs/?tid=35462

(p.s. you can edit your thread to give it a proper title)

Thank you @merwok
I didn't realize I gave it the title 'Untitled', thanks for pointing that out

Hi @MrAwesome. I did something like this. The advantage is my fade uses all 32-colors, not just 16 - although the screen initially is 16.

https://www.lexaloffle.com/bbs/?pid=108564#p