Lightweight Grid Columns and overlay

You would have to use CSS (or JS, depending on the effect).

What are you trying to do?

I am interested in the same effect in WP show post Pro but in Lightweight Grid Columns.

Ok for the background but i have a image on my cell and it's a problem, do you understand ?

You can inspect how it was done in WP Show Posts, however it likely won't be an easy thing to achieve in Lightweight Grid Columns.

This has some cool examples with code: https://codepen.io/nxworld/pen/ZYNOBZ

thank you Tom

No problem :)