Guiding a render with ControlNet Source image in the image studio
Which one to pick depends on what you want kept. Edges and line art hold the outlines, so a new image redraws the same shapes in another style. Depth and surface direction hold the layout in space and let the drawing go. Pose holds the people and nothing else. Regions give flat fields to work from, either as a plan for a new image or as a mask for another tool. Colour and texture keep the palette or the tones, and the tile detectors keep the picture itself, which is how detail is added or a picture enlarged under guidance.
Outlines and the boundaries between light and dark. Canny is thin and literal. The soft-edge detectors follow the shapes a person would draw and ignore fine texture. The scribble detectors draw deliberately rough lines.
Clean line drawings, the way an illustrator would ink the picture. mlsd keeps the straight segments only, which is usually the architecture.
How far each part of the picture is from the camera, drawn light for near and dark for far.
Which way each surface faces, drawn as colour.
The people in the picture, drawn as skeletons and nothing else.
The picture divided into flat fields, one colour for each kind of thing.
These keep the palette or the tones of your picture, and let the shapes go. The tile detectors keep the picture itself, as a guide for redrawing it.