Key Takeaways
- Adding
solosignificantly 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). alonehas comparable suppression effect tosolo. 1-2 people may remain in the background, but the crowd disappears.single personworks 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
1girlalone 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
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)
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
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
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
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.
Lab Director Comment: Just slapping “solo” in there and the whole squad vanishes. Still a straggler or two, but it went from group photo to individual shoot. Love it.
A02: alone
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
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
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
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. soloandaloneperform equally well. Either works, but solo is more common and shorter.1girlalone 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 backgroundorstudiofor guaranteed results.
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