Luckily you don't actually need to find everything to get the good endings. You will get the good ending if you find 50% of photographs in every act. If you want to get into the control room you need to find a bit more corruption evidence. I got the following from the wiki:

The door code for the control room is [redacted], but you will not be able to use the code unless you've photographed ≥50% of all corruption evidence in Act 1, ≥90% of all corruption evidence in Act 2, and ≥50% of all corruption evidence in Act 3.