In nearly every step on the way only as much as 25% out of 64gigs of ram is used but at the end of densifying the pointcloud 99% of ram is in use and 100% swap. And the computer is pretty locked.
Split will be composited at the end… I’m not sure you can avoid issues with PC filtering if you don’t adjust parameters.
You should look into pc-filter. You likely can relax it a bit without losing much detail and it has a massive impact on how many points are included, and thus memory consumption.