BENRI / GUIDES
Keep only the AI illustration changes you wanted
When img2img changes the hair or outfit as well as the expression, merge the intended edit back into the original illustration.
Start with an original and its img2img revision
An img2img pass intended to change an expression may also alter hair, clothing or the background. You might prefer the revised mouth but want the rest of the original drawing.
Use the original as the base and bring in only the selected area from its revision. Revisions with closely aligned poses and features are easier to blend.
Choose regeneration, layer editing or a selective merge
Regenerate when the overall composition needs to change. Use layers when you want to move and combine separate elements freely. For adopting one changed part from a closely aligned revision, a brush-based merge is a direct approach.
Scroll horizontally to compare →
Choose by the extent of the change| Method | Best fit | Approach |
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| BENRI AI Illustration Selective Merge | Part of a closely aligned revision | Brush the change onto the base |
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| img2img | Create a new revision | Inspect for unintended changes |
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| Photopea | Layer the original and revision in a browser | Requires alignment and masking |
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| GIMP | Layer the original and revision on the desktop | Requires alignment and masking |
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BENRI AI Illustration Selective Merge: brush in the intended change
- Open the original AI illustration as the base.
- Load its img2img revision as the difference image.
- Brush over the expression, outfit detail or accessory you want to use, then compare with the original.
- Download the merged PNG and use the image with your chosen expression or outfit.
The example takes one revised eye from a school-uniform illustration while retaining the base image’s hair and clothing.
One revised eye is merged while the original hair and clothing remain. (Japanese interface.)BENRI AI Illustration Selective Merge: merge the intended change ↗
img2img: generate a more focused revision
- Load the source image into your image generator’s editing or img2img workflow.
- Describe the intended expression or clothing change. Select a local mask if the tool supports it.
- Compare the revision with the source. If unrelated areas changed too, use difference merging or a layer editor.
Useful for creating the revision itself. Controls and cost depend on the generator, and unrelated parts can also change.
Photopea: mask the revision above the source
- Open the original image, drag the revision into the document as a layer above it, and align them.
- Add a raster mask to the top layer. Fill it black, then paint white only where you want to reveal the revision.
- Inspect the join and export through File → Export As → PNG.
Useful when you also need control over placement and layers. You manage the mask and active layer yourself.
Photopea — Official instructions
GIMP: combine the images with layers
- Open the source, add the revision with Open as Layers and align it.
- Add a black, fully transparent mask to the revision layer.
- Select the mask and paint white over the desired changes. Refine the join and export a PNG.
An option for desktop work involving several revisions or color corrections. BENRI is convenient for brushing in a small change quickly.
GIMP — Official instructions
Inspect the boundary of the adopted area
For an expression, begin with the necessary area rather than replacing the entire face. Check where a ribbon, clothing pattern or hair accessory joins the surrounding drawing.
If a feature needs substantial repositioning, an editor with layers and masks, such as Photopea or GIMP, gives you more control.
Photopea: layer masks
Create a consistent expression variation
Export the finished illustration as a PNG. You can preserve the character’s outfit and backdrop while creating a variation in the mouth or another selected detail.
Use it as finished artwork or place expression variants together in thumbnails or a character introduction.
