Thanks a lot Mark for your answer, I gind something like that and I'm on a good way ^^

Look my first creation totally made with Daz. Background, object, girl, everything ^^

https://www.deviantart.com/thesandrajayde/art/Sandra-Jayde-s-Farah-861383960

I'm glad for the result !

Need to explore this kind of bokeh things too ^^

MarkCM posted at 12:41PM Mon, 16 November 2020 - #4404774

You need to look around for "bokeh" HDRIs or images. There are a bunch of different options, so you'll need to go through them to see what works.