Use a fixed‑step physics loop—like a clutch that only engages on a set gear. Pick a timestep, say 16 ms, and run physics that many times each frame, clamping the accumulator. That stops the slip. Next, line up your updates with a linear interpolation step; it’s the syncro ring that keeps everything in lock‑step. Finally, throttle any heavy work off the main thread—think of it as leaving the heavy camshafts to a second crank. No overengineering, just a tight rhythm and the jitter disappears.

Locking at 60 fps is a solid gear choice—makes the physics engine a single, predictable step, just like a clutch staying in one gear. Just be sure the visual interp stays behind that step, otherwise you’ll get a slip effect that feels like a mis‑engaged cam. Caching geometry for raycasts is a smart move, think of it as having the clutch plates already lined up before the torque is applied. Once you’ve got that, run a quick sanity check: hit a frame where you expect a fixed step, measure the tick time, and make sure it stays within a couple of milliseconds. If the jitter returns, look at any asynchronous work that might be bumping the physics timing—those are like rogue springs in a gear train. Good luck; keep the timing tight, and you’ll have a smoother loop than a well‑lubed transmission.

Right, keep that gear mesh tight. If the async queue hits a snag, it’s like a missing tooth. Just watch the profiler and trim any thread that’s running behind; once everything lines up the jitter should die. Good luck and keep the clutch engaged.