--orient

--orient takes an integer and controls whether the slicer runs its automatic orientation algorithm on loaded objects before slicing. The value 0 explicitly disables orientation for every object: it iterates all loaded objects and marks each one as not requiring reorientation. The value 1 forces orientation for every object: it marks all objects to be reoriented. Any other integer value (the documented "auto") leaves the per-object orientation map in whatever state it was populated during file loading, which in current builds means the map is empty and no objects are reoriented — functionally equivalent to 0.

The orientation algorithm scores a set of candidate face-down directions for each mesh by computing a weighted cost across overhang area, bottom contact area, bottom convex-hull area, projected contour complexity, and low-angle face area. Before running the algorithm the engine copies the active process config into the object so that per-object settings such as support_threshold_angle (default 30 degrees) influence the scoring. The result is a rotation that is applied in-place to the object before arrangement and slicing. Because orientation mutates the object's transform, the slicer regenerates plate thumbnails whenever at least one object was reoriented or re-arranged.

The flag has a compiled-in default of 0. It is processed only when explicitly passed on the command line, so omitting --orient entirely produces the same result as --orient 0: the per-object orientation map starts empty and no objects are reoriented.