Can't locate incoming call background

[crl3u1]

Hi, I've searched the forum for a while now and cannot seem to find the directory and file name for the background when someone calls you. I also tried looking into created themes, but there are too many png files, I'm not sure which one it is. Actually, I'm not even sure if there is a separate bg for incoming calls or if it just uses your same wallpaper. Please help me out. Thanks!

[AKA_Ben]

I do believe your lock screen wallpaper is the same thing.