Where the control map comes from, and how to get it back on its own.
The image you get back does not follow your picture directly. A detector reads your picture and draws a control map from it: the outlines it finds, how far away each part is, where the joints of a body are. The image the worker makes follows that drawing.Normally you hand in an ordinary picture and the worker runs the detector for you, so there is nothing to set here.Two things change that. If the picture you hand in is already a control map, drawn in alchemy or anywhere else, turn on Image is already a control map and the worker uses it as it stands instead of reading it a second time. If what you want is the drawing rather than an image made from it, turn on Return only the control map, no image and the map comes back on its own.Which detector runs is the control type, and how closely the image follows the map is the control strength.