so the ability to skip past bodies laying on the ground, small gaps that need loose boards, or npcs has already been known because of the Vita version's ability to do these tricks. it's done via pause buffering and then moving past the barrier before the game fully loads everything back in. I watched Just_Samu's Vita run of CH1 and noticed how laggy the game ran in general so I tried limiting my FPS to like 15 on the PC version. funnily enough, you can also clip past these barriers but not in the same way that the Vita does. having low fps just skips frames of animation in your characters movement so it's kinda similar to the teleporting around that happens in FPS games when you're dropping packets. you can just push past certain barriers without pause buffering, 10 FPS seems to be the sweet spot for letting you move with some control but also clipping quickly past the barrier. I've found skips in CH1 thru 4 so far, this equates roughly to like 2 minutes with CH1 accounting for half of that. since it doesn't change very much of the speedrun and you have to use an external program to limit your FPS, we're holding back on putting any runs with this on the leaderboards. if any interest develops in using FPS toggling though, we're willing to allow it but since I'm the only one that was interested at the time we're holding off for now.
I used MSI Afterburner's RivaTuner Statistics Server to toggle my FPS during play. I'll post a guide on how to use this in the guides section of this board. go find some sick clipz