How can I open the picture in a custom window

Here is an example:
https://www.frederiksamuel.com/blog/2008/08/toyota-camry.html

picture opens in a custom window. All the pictures do.

I currently use an overlay and not too happy:
https://globalmotors.net/exclusive-porsche-panamera-with-an-open-rear-door/

I would like pictures to open in a custom window in full size.

Does anyone know how to do it or can point to a plugin perhaps?

thanks.