background picture

[new339]

Hello I am a newbie and am slowly learning Mandelbulb 3D version 1.8.9

I am trying to add a background pic but cannot figure out how to do it.
I go to Lighting and to Back Pic and check the background image which takes me to a jpg I want to use. I open the jpg but upon returning to Back pic the checkmark is gone and so is the pic.
Help!!!!! Perhaps a link to a video?
Thank you for any help.
John in Wonderland

PS I just figured it out. I had to put the jpg in a folder and point Mandelbulb at it in ini and initial directories. Sorry for the fuss. I would delete this but of course I don't know how to do that either.........