Thx Semfry.
I remember now, The fog elements were taken out and various gameplay parts were changed to align with the difficulty levels. I wont say anyone's name but there was someone on these forums who helped me a great deal during the final version which hasn't been released yet. I will release it when I knit them all together but only with his permission as there is programming involved which I don't own. This last version is pretty good!
As for Jets request, unfortunately, I cant show you any photos of the source material as no phones or cameras were allowed on site to show you.
If you look at the 1st and 3rd screen it shows some kind of cylinder type structure, I based this on the 'hydrocarbon cracker'. It's simply a large industrial distillation tower that 'cracks' the large hydrocarbons into long chain distillates such as heavy gas oil, diesel, gasoline all the way up to methane, ethane, kerosene etc.
The 2nd shot is the hydrogen gas turbines which power part of the plant which excess gas from the process (the Krall love those things it seems).
The 4th shot was something I just made up on the fly with the green slime on the floor. I didn't intend it to be similar to HLOF but it did turn out that way. In the end I thought, oh well, it does look like it and maybe it plays like it too much but I couldn't be bothered to change it!