How to make background fade like an overlay

so this is used in “Clothes Off” and in “The New Girl” where you can customize the MC and the background fades like an overlay and when you’re done customizing the background goes back to normal how do I do this I tries making the background an overlay but it’s too big.

you uploade the background as an overlay

The background’s too big how do I do it?

But the image is 1.5 mb. How do I make it 1mb?

do something like this It may seem really small but you can always make it bigger inside of the story and try to uploud it

I understand, thank you so much!!!

Marked as solved. Closed and thanks all! :smile: