Silhouette Cleanup

Overview

Cleans up L-shaped steps in a silhouette—the protrusions and chips that appear on diagonal lines and corners. It is a finishing node that makes pixel-art outlines look closer to carefully hand-placed pixels.

Usage tips

• It affects only the alpha shape, not color steps inside the artwork. Fix those by hand or with color-reduction tools.
• Start with OpaqueSide (remove protrusions). If the shape becomes too thin, switch to TransparentSide (fill chips).
• Place it before outline to reduce irregularities in the outline.
• Split responsibilities with pixel_cleanup (isolated pixels and holes): that node handles dots; this one handles corners.

Related nodes

• pixel_cleanup — clean up isolated 1px artifacts
• outline — add an outline after cleanup
• path_stroke — for path-derived shapes, start with pixel-perfect rendering

When to use it

• When you want to clean up L-shaped steps in an alpha silhouette at 1px diagonal lines and corners
• When you want to remove or fill small parts of a silhouette in an image that did not come from a path
• When you want to clean the source-image silhouette itself rather than choose the inside or outside of a band such as Outline

Notes

• This is not exact pixel-perfect correction derived from vector paths.
• It binarizes image alpha and applies raster correction to that silhouette.
• It is therefore not a substitute for "true pixel perfect" processing on general images.
• In other words, changing only the colors inside does nothing. It takes effect only when the alpha silhouette changes.
• It is normal for a perfect square or rectangle with no L-shaped corners to remain unchanged.
• Correction Mode = Opaque Side removes L shapes protruding from the filled silhouette.
• Correction Mode = Transparent Side fills corner chips on the transparent side with neighboring colors.
• This organizes shapes based strictly on the alpha silhouette, not color boundaries.

Examples

1. Clean up L-shaped noise that appears only at the corners of a pixel-art character.
2. Clean the source image before Outline to reduce broken outlines.
3. Make diagonal lines and rounded 1px silhouettes look more like pixel art.