Working from a picture

Switch on Start from image, then drop a picture on the box or click it to choose one. Or click Use as input on any picture in your history.

Under the picture: its original size, and these buttons.

button does
Choose / Replace image… picks a picture from your Mac
Remove takes the picture out of the box (the file is not touched)
Match image size sets Size to the picture’s shape, up to about 2 megapixels
Describe image writes a description you can use as the prompt
Select area to change… opens the area editor (so does clicking the picture)
Clear selection lets the whole picture change again

Change

Change sets how far the new picture may move from yours, from 0.01 to 1. The examples show a baseball card across the range.

Change result
0.01–0.2 almost identical: cleaner, sharper, slightly retouched
0.25–0.7 same picture with details redone; colors and layout kept
0.75–0.85 same pose and framing; the prompt sets colors, clothes, light, and lettering
0.9–0.95 a new picture with a similar subject and layout
1.0 only the prompt matters; your picture is ignored, except outside a selected area

Prompting

The prompt matters at every setting of Change: describe the picture you want to end up with, not the change you want made. Describe image is a quick way to get a prompt that matches your picture, ready to edit.

Changing part of a picture

Select area to change… opens the area editor.

The area editor: the ice cream picture cropped to the cherry and vanilla bowls, with the PLAIN card painted red so it can be rewritten

Here the picture is cropped to two bowls, and the card reading PLAIN is painted, ready for a prompt that says “VANILLA” instead.

  • Paint over what should change; it shows in red. Erase, or hold ⌥ while painting, removes paint. Clear removes it all.
  • Brush size and Feather size (how softly the new part blends in) are beside them.
  • Close the window however you like; the selection is kept and shows in red on the picture.

Then write a prompt for the whole picture as it should end up, set Change, and Generate. Only the selected area changes; the rest stays exactly as it was.

  • Replace something: Change 1.0, and a prompt describing what should be there
  • Fix or restyle something: Change 0.5–0.8

The main window after the change: the cropped picture with the card now reading VANILLA at the top of the history, the original three-bowl picture below it, and on the left the starting picture with its painted card and Change set to 0.90

The prompt now names the cards “CHERRY” and “VANILLA”. On the left, Start from image shows the cropped picture with the painted card; on the right, the result, with the original below it.

Extending and cropping

In the same editor, Extend (+) or crop (−) adds space to any side, or trims it. Or drag the dashed edge: outward to extend, inward to crop. Cropped parts show faintly; new space shows in red. Paint under a cropped part is kept, so you can adjust the crop and the paint in either order; only what is inside the frame is used.

New space is always filled in from scratch to match the picture, so Blokjutsu sets Change to 1.0 when you extend. A crop alone simply gives you a smaller starting picture.

Upscaling: making a picture bigger

MOSS-Image makes a good upscaler:

  1. Start from image with the picture, then Match image size.
  2. In the MP menu, choose ×1.5, ×2, or more (up to about 4 megapixels).
  3. Set Change low: 0.01 keeps the picture exactly and sharpens it, quickly; 0.05–0.1 lets the model add new fine detail, more slowly.
  4. Use the picture’s own prompt (Reuse settings, then switch Start from image back on) or Describe image.