[Experiment] Eyelash and Eyeliner Prompts | 10 Conditions, 30 Images

Conclusions First

• All lash keywords are effective. false lashes, long lashes, and lash extensions all produce clearly longer and thicker lashes compared to control
• Eyeliner keywords also have strong effects. cat eye liner, winged liner, and thick liner produce bold black lines with visible outer flicks
• cat eye liner and winged liner produce similar results, though cat eye liner tends toward a slightly thicker line overall
• thin liner draws a finer line but still produces outer corner flicks like cat eye liner and winged liner
• lower lashes emphasizes lower lashes and changes the eye’s overall impression
• no liner acts to remove eyeliner but lash presence remains similar to control

Experiment Design

Base Prompt

close-up face portrait was used to allow detailed observation of the eye area.

A00: control

seed 1	seed 2	seed 3

Observation: Default output shows naturally-length lashes. Eyeliner is faint and not recognizable as a defined line. Individual lashes are not distinctly visible at any notable length or volume. Overall a subtle eye look.

A01: false lashes

seed 1	seed 2	seed 3

Observation: Dramatic change from control. Lashes are significantly longer, with each lash individually separated and visible. The outer lashes are particularly long, fanning out dramatically. This clearly reproduces the look of false lashes — distinct from the natural lashes in control. Upper lashes extend well beyond the iris border, greatly emphasizing the eye contour.

A02: long lashes

seed 1	seed 2	seed 3

Observation: Clear change from control. Lashes are long with a curl. Separation is slightly less pronounced than false lashes but length is comparable or greater. The result looks more like “naturally very long lashes” rather than false lashes.

A03: lash extensions

seed 1	seed 2	seed 3

Observation: Clearly long, individually separated lashes. Volume concentrates toward the outer corner, characteristic of lash extensions. In seed 2, earrings (beaded drop earrings) appeared as a side effect. The lash effect itself is comparable to false lashes.

A04: cat eye liner

seed 1	seed 2	seed 3

Observation: One of the most dramatic changes from control. A thick, defined black line runs along the upper lid, with a sharp upward flick at the outer corner. The line is clearly visible in the center of the eye and becomes even thicker toward the outer corner. Completely different from the subtle control look. Lip color is also more muted, shifting focus to the eyes.

Lab Director comment: Okay, I love this. The sharpness of that cat eye liner flick is exactly the kind of look I’d use for jisatsu-kei makeup. And the fact that the lips are pulled back to let the eyes go all-in — perfect.

A05: winged liner

seed 1	seed 2	seed 3

Observation: Output is similar to cat eye liner. A thick black line and outer flick are visible. Comparing seed 2, line thickness and flick angle are nearly identical to cat eye liner. It’s difficult to find a consistent difference between the two — in z-image-turbo, cat eye liner and winged liner are likely treated as nearly synonymous.

A06: thin liner

seed 1	seed 2	seed 3

Observation: An eyeliner line is visible but clearly finer than cat eye liner or winged liner. Seed 2 shows a small flick at the outer corner, but the line itself is restrained and doesn’t cover the full lid. Compared to control, the line is clearly more defined and darker, so the “liner” effect is present, but without the boldness of cat eye liner. Suitable when a subtle liner look is intended.

A07: thick liner

seed 1	seed 2	seed 3

Observation: A thick, dark black line runs along the upper lid. Seed 2 shows line thickness comparable to or greater than cat eye liner, with a clear outer flick. Difference from cat eye liner: thick liner tends to have a uniformly thick line, with greater coverage from the inner to outer corner, resulting in a larger total area of black liner on the lid.

A08: lower lashes

seed 1	seed 2	seed 3

Observation: Lower lashes are clearly emphasized. Seed 2 shows multiple fine lashes below the lower lid that were barely visible in control. Upper lashes also appear slightly longer. The main change is the visibility of lower lashes. The emphasized lower border makes the eye look rounder and larger overall.

A09: no liner

seed 1	seed 2	seed 3

Observation: Almost no difference from control. Since the control already has minimal eyeliner, there’s little liner to remove. Lash length and volume are also similar to control. The effectiveness of this keyword for removing liner from a state that already has visible liner (e.g., after applying cat eye liner) has not been tested, but it produced no visible change relative to the default output.

Summary

Lash Keywords

For making lashes stand out, false lashes, long lashes, and lash extensions are all effective. For a natural finish, use long lashes; for a glamorous false-lash look, use false lashes.

Eyeliner Keywords

All eyeliner keywords have clear effects. cat eye liner and winged liner can be used interchangeably. For thickness control, thin liner / thick liner allow adjustment.

Lab Director comment: Good to see both lashes and liner actually working. Since cat eye liner and winged liner are basically the same, just use the shorter one — cat eye liner. You can also fine-tune thickness with thin liner, so there’s quite a bit of flexibility with eye looks.