Prison Arcitect Alpha 4 fixes fog of war by making you more godlike

From Introversion's Youtube channel:

I've not played Prison Architect since the first alpha version, though it was glorious then, so I can't comment on how the newer system plays, but it's a canny solution to the problem. Although, I like Delay's original approach; by having unobservered areas appear as the building's rooftop it was as though you, as warden, are literally looking down from a bird's eye view, with the limitations of your perspective being absolved by viewing you prison through the guards eyes. This new system loses something of that positioning, by giving you godlike x-ray eyes, but solves the core problem, so it's a good thing overall.

Delay breaks down the complete changes to the system on the game's blog:
= Fog-of-war overhaul in response to community feedback 
    - Areas hidden by fog-of-war are now rendered in darkened greyscale instead the solid roof effect 
    - Walls, floors and Static objects under fog-of-war remain visible but greyed out. 
    - Guards and Cctv now have a longer view range 
    - The Chief has a long view range 
    - Workmen, Cooks and Doctors have a short view range 

If you're liking the look of the above video but aren't yet in the alpha, have a read over Phill's preview and if you like what you read you can still buy into the alpha over here.