Problem height images

Good afternoon, thank you very much in advance.
My page is the NEXT: https://www.egr-studio.com (THEME: SYDNEY)

I want my images 100% height. Responsive at differents screens.
Like this page:
https://www.oliverburns.com/portfolio/private-residences/

I make that:
https://www.egr-studio.com/egrinteriordesign/

but isn’t the same. If you do a zoom you can see what i mean.

Ideas?
Thanks alot!!!