#voxel

A per-frame visual-smoothing offset computed from raw fixed-tick state double-smooths against the engine's built-in FixedUpdateInterpolation, producing a 50 Hz sawtooth that reads as model flicker on stepped terrain: delete the manual smoother or compute against interpolated state.

A zero-radius Scene.Trace.Ray passes straight through coarse voxel ModelColliders and returns Hit=false. Sweep a thin sphere (.Radius(...)) and it hits.