Merge & split paint by numbers regions — fine-tune your template

Auto-generated colour regions aren't always exactly what you want. paintbynumbers.build lets you merge small or unwanted regions together, or split a region that's too broad — directly on the generated result.

Why region editing matters

Automatic quantization sometimes leaves tiny flecks of colour in a smooth area, or lumps two visually distinct areas into one region. No competitor we've found offers manual region clean-up — you either accept the algorithm's output or start over with different settings. Region editing lets you fix it directly instead.

How to merge regions

1. Generate your template, then switch to the Merge tool in the Refine step.
2. Click two adjacent regions to select them.
3. Confirm the merge — the regions combine into one, and the colour count updates.

How to split a region

1. Switch to the Split tool.
2. Click a region that's too large or contains more than one colour you'd like to separate.
3. The tool analyses the region's colour variance and proposes a split.

Pair region editing with a vector SVG export so your edits stay crisp at any print size.