Hey guys, been absent from this game and speedrunning in general for the last half year, only recently got back into it.
About the Train Skip v3: I haven't been able to get in contact with the Chapter 15 trigger using that method, because it seems that you're too low and you just go underneath...
Also something about the C19-20 skip. Firstly, I haven't been able to get it once, it's really hard and very inconsistent. My main focus right now is on finding a consistent set-up for it.
What's also nice is that you can take RPG ammo with you. Something interesting that I've found is that the only place in C19 that spawns RPG ammo, which I will refer to as the 'drop spot' (besides the one guy that shoots RPG's at you, who I will refer to as the 'RPG guy') will give you either 1 or 2 RPG ammo randomly, and if you hit a checkpoint and restart, then the ammo at the drop spot will regenerate and will again give you 1 or 2 ammo randomly. The RPG guy is on the roof and will give you 1 ammo if it falls to the ground, which can occur randomly. I've created a flow chart for both the 1 and 2 ammo case, with the optimal strategy to get 3 RPG ammo before the skip:
If you get 2 ammo, then it's best to kill the RPG guy first because the game might take a little while before you can restart the checkpoint. So in the meantime you have a probability that you may not even need to restart at all.
EDIT: Also something worth noting: if you're in a fight and are standing somewhere OOB then at some points the area might unload itself, but the enemies stay visible. This way you can hit enemies as if there was no cover, which can be a lot faster. So it may be useful for some long forced fights without open areas. Still needs to be tested...
All 3 games for PS4! Looking forward to seeing UC1's jump physics with PS4 graphics 4Head