Single post in lightbox?

Hello,

I would like to put the content of a single post in a lightbox, but no matter how hard I try, I can’t get it to work. It shows the whole page, not just the post.

I then tried to put a su_posts inside a su_lightbox, but no luck. Isn’t it possible to put a shortcode inside another shortcode, or is it just me who doesn’t know how to do it right?

I’d be very grateful if anyone could help me with this!

https://ww.wp.xz.cn/plugins/shortcodes-ultimate/