File:Sardaukar alternate blue-tinted armour and 'insectile' slit visor helmet concept art for Dune (2021) by Keith Christensen.jpg

Summary
Concept art of the imperial sardaukar armour for Dune (2021), by Keith Christensen. Alternate blue-tinted version of the armour and an alternate, vaguely "insectile" version of the helmet, with vertical slit visors.

Source: Keith Christensen's ArtStation.com profile - "A few of my alternate Sardaukar designs for Dune"