This is the end result of the interrogation room render with new additions and few little but big changes.
The major change from the previous renders is that the above image had five displays in it showing some numbers which refer to the main story plot and are the key to the mystery. I have also decided to change how the light bulb looks. In previous images the light was emitting from the whole glass piece but when I looked back at the older renders it didn't look very realistic. Instead what I decided to do is apply the actual glass shaded to the glass and create and object inside of that which is emitting light. You can see that in the above render the light bulb looks much more realistic than in the two previous ones.
The full sized image of the poster is 3000 pixels wide and 4000 pixels high. This ensures very high quality of the render and because of the very high resolution the poster can be specially printed and put on a wall like a real poster would be.
I also tweaked some of the colour of the image in Photoshop to make it more moody. I removed some reds so the room feels colder and creepier. I added some glow effect to the inside of the light bulb so it looks like it's emitting light and I added a subtle vignette to the image as it looks better with it. The very final result can be seen below.