> - The wall is approximated, not reproduced. Cut positions snap to the half-grid (grid vertices and edge midpoints), so the wall can deviate from the STL by up to a quarter of the local cell size. The remedy for tighter walls is local refinement, never a more exact cutter. > - Sub-cell features do not exist. One cut face per cell means a thin plate or gap smaller than a cell is not represented at all — not approximated coarsely, absent. This is what choosing a cell size means, and it is the same lever as everywhere else: resolve the features you care about with refinement, and they appear.