Key Takeaways
- Adding
solo significantly reduces background crowd generation. Without it, 8-10 teammates appear in the background; with solo, this drops to 0-3 (confirmed in 3/3 images). alone has comparable suppression effect to solo. 1-2 people may remain in the background, but the crowd disappears.single person works but is less stable than solo or alone. The number of background people varies more widely.- Complete elimination isn’t guaranteed. With any condition, 1-2 background figures may remain. Still, adding solo is well worth it when
1girl alone isn’t enough.
Experiment Design
| Parameter | Value |
|---|
| Model | z-image-turbo (6B, photorealistic distilled) |
| Steps | 8 |
| CFG | 1.0 |
| Size | 1024x1024 |
| Seeds | 3 fixed (shared across all conditions) |
| Per condition | 3 images (3 seeds) |
| Total | 4 conditions × 3 = 12 images |
Base Prompt
1girl, 32yo japanese actress, {person count keyword}, wearing cheerleader uniform with crop top and pleated skirt, pom poms, standing, facing camera, full body, stadium, bright lighting
The cheerleader uniform + stadium background was previously confirmed in the cheerleader-outfit-test to spontaneously generate teammates. This setup is used to test the suppression effect of person-count keywords.
Evaluation Criteria
- Background people count: How many people appear besides the main subject
- Main subject composition: Whether the single-person pose and framing are maintained
- Background changes: Whether the stadium rendering is affected
Testing Each Condition
A00: No solo (Control)
1girl, 32yo japanese actress, wearing cheerleader uniform with crop top and pleated skirt, pom poms, standing, facing camera, full body, stadium, bright lighting
Observations: In 3/3, a large number of teammates flood the background. A cheerleading squad of 8-10 people is rendered despite specifying “1girl.” The cheerleader + stadium context strongly triggers team activity generation.
A01: solo
1girl, solo, 32yo japanese actress, wearing cheerleader uniform with crop top and pleated skirt, pom poms, standing, facing camera, full body, stadium, bright lighting
Observations: Background people count dropped significantly. In 3/3, the main subject dominates the frame, with background figures reduced to 0-3. A massive improvement from A00’s 8-10 people. Not completely zero, but the crowd feel is gone, and the composition works as a solo cheerleader portrait.
A02: alone
1girl, alone, 32yo japanese actress, wearing cheerleader uniform with crop top and pleated skirt, pom poms, standing, facing camera, full body, stadium, bright lighting
Observations: Comparable suppression effect to solo. 1-2 people may linger in the background, but the A00-style crowd doesn’t appear. alone functions similarly to solo in reinforcing the “single person” context.
A03: single person
1girl, single person, 32yo japanese actress, wearing cheerleader uniform with crop top and pleated skirt, pom poms, standing, facing camera, full body, stadium, bright lighting
Observations: single person does suppress background people, but it’s less stable than solo or alone. Across 3 images, the background count varied widely – sometimes 0, sometimes 3-4. It also costs 2 tokens, making it less efficient than the 1-token alternatives.
Comparison Summary
| Condition | Background People (Range) | Suppression Effect | Token Count | Stability |
|---|
| A00: None | 8-10 | – | 0 | – |
| A01: solo | 0-3 | High | 1 | Stable |
| A02: alone | 1-2 | High | 1 | Stable |
| A03: single person | 0-4 | Moderate | 2 | Somewhat unstable |
Practical Tips
- When shooting a single person in a group scene (stadium, classroom, party, etc.), add
solo. One token for a big effect. solo and alone perform equally well. Either works, but solo is more common and shorter.1girl alone isn’t always enough for crowd suppression. Especially with situations that imply group activity (cheerleading, band, sports), pairing with solo is recommended.- For completely empty backgrounds, combine with
simple background or studio for guaranteed results.
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