[Experiment] Reproducing Female Track Athlete Portraits with Prompts

Conclusions

• Uniform color schemes were reproduced stably across all 4 patterns. White×navy, deep red, black×emerald green, and white×sky blue all produced results close to the specified colors in 3 out of 3 images.
• Ponytail height difference is reproducible. The positional difference between high ponytail and low ponytail was visually confirmed in the output. bun also reproduced at 3/3. However, half-up style showed little difference from a ponytail, making clear distinction difficult.
• Stadium background bokeh was stable across all 12 images. stadium bokeh with blurred spectators is a reliably functional key phrase, producing press-photography-style images with blurred spectators, track, and field.
• Bib numbers appear in every image, but the text is random characters. No actual competition names or numbers were produced.
• braided hair tends to generate multiple people. In Condition E, 2 people appeared, suggesting it may induce teammate-style scenes.
• Short bob (short bob) was stable with a single subject and clearly distinct from ponytail and bun. In Condition F, it reproduced stably alongside a navy×white color scheme.

What This Article Covers

• Accuracy of color specification for track uniforms
• Reproducibility of hairstyles (ponytail height, half-up, bun)
• Stadium bokeh background rendering
• Prompt structure patterns for sports portrait shots

Experiment Conditions

Common elements across all prompts: 1girl, 32yo japanese actress, female sprinter, standing naturally by track, stadium bokeh with blurred spectators, documentary sports photography, 85mm lens, DSLR

Control: track uniform only

seed 42	seed 123	seed 789

Observation: With only track uniform specified, the color scheme varies by seed. Seed 42 produced a blue-striped uniform, seed 123 a blue uniform, and seed 789 also a blue-dominant result. Blue tones are predominant, but color control is not working. Stadium background bokeh was stable at 3/3, with track and spectator seating visible. Bib numbers appeared on the chest in 3/3.

Condition A: White×Navy + High Ponytail

seed 42	seed 123	seed 789

Observation: The white×navy color scheme reproduced in 3/3. Seed 42 shows a white top with navy accents and navy shorts. Seed 123 also produced a white×navy color scheme with other athletes and officials blurred in the background. Seed 789 shows the white×navy scheme with a visible bib number. The high ponytail is tied high in 3/3. Stadium background is stable across all images.

Condition B: Deep Red Singlet + Low Ponytail

seed 42	seed 123	seed 789

Observation: A deep red (maroon to wine red) singlet was generated in 3/3. Seed 42 shows a red singlet with a stripe pattern, seed 123 a slightly horizontally striped red singlet, and seed 789 also a maroon-leaning red. Black running shorts confirmed in 3/3. The low ponytail is clearly positioned lower than the high ponytail in Condition A, with the positional difference confirmed in 3/3. The singlet specification produced a tank-top style uniform in 3/3.

Condition C: Black×Emerald + Half-Up

seed 42	seed 123	seed 789

Observation: The emerald green×black color scheme reproduced in 3/3. Seeds 42 and 123 show a green×black striped-pattern top, seed 789 similarly. Emerald green is a distinctive color and easy to identify. Black running shorts confirmed in 3/3. While a clear distinction from a ponytail is difficult for the half-up style, strands of hair falling around the face were confirmed in 3/3. That said, the difference from the ponytails in A and B is small — only 1–2 images could clearly be identified as half-up.

Condition D: White×Sky Blue + Bun

seed 42	seed 123	seed 789

Observation: The white×sky blue color scheme reproduced in 3/3. Seed 42 shows a white top with sky blue accents and sky blue shorts. Seeds 123 and 789 also show similar coloring. The bun hairstyle was compact and positioned high in 3/3, with a clearly distinct silhouette from ponytails. The refreshing sky blue aesthetic pairs well with the soft daylight setting.

Condition E: Braid + White×Orange

Testing braided hair for a clearly distinct hairstyle from ponytail styles.

seed 42	seed 123	seed 789

Observation: Seed 42 produced 2 athletes. braided hair may induce teammate-style scenes. The white×orange uniform color scheme was reflected, but multiple people were generated despite the 1girl specification. The braided hairstyle itself was confirmed, but caution is needed to stabilize a single subject. Stadium background bokeh is stable.

Lab Director’s comment: Getting 2 people from braided hair — feels like the team vibe is bleeding through. Probably best to avoid it when you want just one subject.

Condition F: Short Bob + Navy

Testing a short bob as a drastic departure from longer hairstyles.

seed 42	seed 123	seed 789

Observation: Seed 42 produced a stable single-subject output. The short bob hairstyle was clearly reproduced, with a silhouette distinctly different from ponytails and buns. The navy×white color scheme was also stably reflected. Unlike Condition E’s braided hair, short bob haircut stabilizes the single-subject output. In addition to ponytails and buns, the short bob works as a clearly distinct third hairstyle option.

Lab Director’s comment: Short bob clearly stands out from ponytail, and the single-subject stability is a plus too.

Summary Comparison

Uniform Color Reproducibility

Hairstyle Reproducibility

Lab Director’s comment: Honestly, all 4 color patterns coming out 3/3 was a bit unexpected. The half-up vs ponytail distinction is a weak point, but buns and short bobs are clearly differentiated, so it’s workable for hairstyle variety. The press-photo vibe from stadium bokeh with blurred spectators is solid too.

Related Articles

3 "God Prompts" That Never Miss | Ablation-Verified Minimal Versions

[Experiment] Prompts for Female Muscle Definition | 14 Conditions, 42 Images