This Texture Pack simply replaces the Pumpkin Blur with the interior of The Doomslayer's helmet as seen at the start of Quakecon 2018's DOOM Eternal Gameplay Reveal
If you think this is cool, but hides too much to make you want it then don't worry! You can find a more transparent option here:

https://www.planetminecraft.com/texture-pack/doom-eternal-pumpkin-helmet-transparent/