Controlling composition with Regional Prompter
Regional Prompter is an Automatic1111 extension that lets you point different prompts at different parts of the canvas — a knight on the left, a dragon on the right, a sunset sky above a city below. Instead of fighting a single prompt that blends everything together, you define regions and give each one its own description. This tool generates the exact split mode, divide ratio, and a BREAK-separated prompt template for the layout you choose.
How it works
You pick the number of regions and a layout. The tool maps that to Regional
Prompter’s settings: the split mode (Columns, Rows, or Matrix), the
Divide Ratio string that proportions the regions, and a prompt template
where each block separated by BREAK corresponds to one region in reading
order. For matrix layouts it uses the ; row separator and , column separator
syntax the extension expects, so the ratio is always valid.
Understanding Divide Ratio in practice
The Divide Ratio controls proportional sizing of each region, not pixel positions. A few examples:
| Layout | Divide Ratio | Result |
|---|---|---|
| 2 columns | 1,1 | Left and right halves equal width |
| 2 columns | 1,2 | Left takes one-third, right takes two-thirds |
| 3 rows | 1,3,1 | Small header band, large middle, small footer |
| 2×2 matrix | 1,1;1,1 | Four equal quadrants |
| 2×2 matrix | 1,2;1,1 | Top-right quadrant is twice as wide |
For a portrait with a subject on the left and a detailed background on the right, try 2,3 to give the background more room without it feeling empty. For a landscape with sky above and a city below, 1,3 rows push most of the canvas to the foreground where the detail lives.
Worked example: two-character scene
Suppose you want a mage on the left and a warrior on the right sharing a misty forest. In Regional Prompter:
- Split mode: Columns
- Divide Ratio:
1,1 - Base prompt:
fantasy illustration, soft ambient light, misty forest background, detailed oil painting - Prompt block 1 (left):
young female mage in blue robes, casting spell, glowing hands - Prompt block 2 (right):
armored male warrior, sword raised, battle stance
Full prompt in the A1111 field: the base prompt, then BREAK, then block 1, then BREAK, then block 2. Without Regional Prompter, a single prompt blends both characters or produces one dominant figure; with it, each half of the canvas responds to its own description.
Tips for reliable regions
- Use a Base prompt for shared style. Put global lighting, medium, and color grade in Base; keep per-region blocks about subjects only.
- Keep region blocks distinct. Overlapping descriptions bleed between regions — make each subject clearly different.
- Match block order to layout. Columns read left-to-right, rows top-to-bottom, matrix row-by-row. The template already orders them correctly.
- Adjust the ratio for emphasis. Change a
1,1to1,2to give one region more canvas when a subject needs more room. - Avoid negative prompts per-region. Regional Prompter’s negative handling varies by version — put negatives in the main negative prompt field rather than per-region BREAK blocks to avoid unexpected behavior.
- Use at least 512 px per region. Regions below about 512 pixels wide or tall often lose fine detail, because the latent-space patches at that scale are too few for diffusion to resolve complex subjects.