I wonder if the hair effect will also run on NPCs like ashley or some bosses in the full game? Maybe it literally just has headroom left over for other characters when only leon is on screen.Edit: ran a few more tests and I'm convinced hair is a very narrow workload that isn't filling the gpu. At all resolutions gpu clocks are 100-200Mhz higher with hair enabled which points to fewer SMs being active allowing for clocks to ramp. At higher resolutions some work seems to run in parallel with hair rendering as the net cost of enabling hair is lower ~2.5ms at 1600p compared to ~3.4ms at 720p. So there is some async compute at play.