I'm not sure if it's specific to this FM, but I found an issue.
When I try peeking through a keyhole (by leaning forward), Dark Mod v2.09 crashes for me under Manjaro Linux. I've tried this with both the original version of the mission and v2. (Edit: Never mind, I've been playing v2 all along. I just downloaded it from two different sources and thought they are different.) In the latter, I could reproduce it by starting a new game on the hardest and easiest difficulty, going down the ladder from the starting position, and peeking through the keyhole of either of the closest doors.
I'm attaching the terminal output of running "./thedarkmod.x64 +set logfile 2 +gfxinfo +map nowandthen +condump nowandthenv2_log.txt", as well as the generated nowandthenv2_log.txt. (The latter doesn't seem to contain anything about the crash itself.)
Other than this, I'm enjoying the mission so far.
nowandthenv2_console_output.txt nowandthenv2_log.txt