This is Will of The Emperor, a mod that enables God-Emperor mode, no reloads and infinite slide amongst other things, but most importantly here the ability to wander around missions without resistance.
- Download the mod
- Download the Solo Play mod which lets you run any mission offline
- Load up a mission with Solo Play then in Will of the Emperor turn on either Invisibility if you still want to see the filthy heretics, or Disable Enemy Spawns if you want a completely empty map. They can be toggled back off at any time.
It intentionally only works in the Pykhanium, Prologue and Solo Play missions— clientside or self-hosted maps which are completely separate from progression, rewards and other players.
The depth of field effect is from another photo/cinematic mod I’m working on that will pair well with this. You can see a collection of sample shots in this thread: Gallery of Captain photography - #7 by brotherhood and follow updates here https://ko-fi.com/ronvoluted