--allow-rotations

Controls whether the arrange engine is permitted to rotate objects when placing them on the build plate. It accepts a boolean value; the default is true, meaning rotations are on unless explicitly disabled.

When the flag is true, the arranger does not merely test a fixed grid of angles. For each object it first computes the minimum-area bounding box rotation — the Z-axis angle that minimizes the object's footprint — then assembles a candidate angle set around that result. If the computed angle is negligible (effectively 0°), the engine tests the four standard orientations: 0°, 45°, 90°, and 135°. Otherwise it tests five candidates: the explicit 0°, the optimal angle itself, and the optimal angle offset by 45°, 90°, and 135°. The placement with the lowest packing cost wins. When the flag is false, the candidate set collapses to a single angle (0°), and every object is placed exactly as oriented in the 3MF.

The flag is wired into the arrange configuration at both arrange call sites in the CLI: the assemble-plates path (a per-plate loop used when assembling multi-source plate jobs) and the standard arrange path (used for both global multi-plate and single-plate arrange). Both paths forward the value identically, so the behavior is consistent regardless of which arrange mode is active.