Pushing Thigh Thickness to the Limit | very thick → extremely thick → massive → thunder thighs

Key Takeaways

• massive thighs had the strongest effect on thigh thickness. However, it tends to make the entire body curvier, not just the thighs. Isolating thigh thickness alone is difficult.
• very thick thighs and extremely thick thighs showed little difference from thick thighs. Adverb intensifiers (very/extremely) have limited impact.
• thunder thighs was surprisingly ineffective. Colloquial/slang expressions may not be well-represented in the model’s training data.
• Body type descriptors (curvy, voluptuous, etc.) may be more effective than thigh-specific modifiers. This remains a topic for future testing.

Relation to Previous Article

In our previous thigh descriptor test, we compared thick thighs / toned thighs / plump thighs / slender thighs and concluded that “differences are small.”

This follow-up tests whether adverbs and stronger adjectives can push thickness further beyond thick thighs as a baseline.

Experiment Design

Base Prompt (same as previous article)

Conditions

A00 (control) and A01 (thick) use the same prompt and seeds as the previous article, so images are referenced rather than regenerated.

Results by Condition

B01: very thick thighs

seed 1	seed 2	seed 3

Observations: Seed 3 shows some added volume in the thighs and hip area. Seed 1 produced a multi-panel composition with a sheer skirt. No dramatic difference from the previous thick thighs condition. 1 out of 3 images showed a slightly fuller body type.

B02: extremely thick thighs

seed 1	seed 2	seed 3

Observations: Similar trend to very thick. Seed 3 shows increased thigh volume with an overall fuller body type. Seed 1 produced a multi-panel composition with decorative skirt designs. No clear difference between very and extremely was observed.

B03: massive thighs

seed 1	seed 2	seed 3

Observations: The most noticeable thickness change among all 4 conditions. Seed 3 shows clearly fuller thighs and hip area, with volume that seems to push against the skirt. Seed 1 also shows some fullness despite the multi-panel composition. However, the result is more “overall curvier body” than “specifically thicker thighs.” 2 out of 3 images showed increased thickness.

B04: thunder thighs

seed 1	seed 2	seed 3

Observations: Surprising result. While “thunder thighs” is English slang for thick thighs, the generated images showed standard to slightly slim body types. All 3 seeds produced thigh thickness comparable to or less than the control (no modifier). The slang term appears to be poorly interpreted by the model.

Cross-Condition Comparison (seed 3)

Seed 3 consistently produced the most stable single full-body compositions, so we compare seed 3 across conditions.

very thick	extremely thick	massive	thunder

Thickness ranking: massive > extremely thick ≒ very thick > thunder (≒ control)

Analysis

Adverb intensifiers have limited effect

Escalating from thick → very thick → extremely thick did not produce a gradual increase in thickness. Adverbs (very, extremely) contribute minimally to thigh thickness control in this model.

“massive” means “bigger,” not just “thicker”

massive had the strongest effect likely because it signals overall “size/volume” rather than specifically “thickness” of a body part. As a result, the entire body became curvier, not just the thighs. Pinpoint control of thigh thickness alone remains challenging.

Slang expressions are poorly handled

thunder thighs produced results comparable to the control, contributing nothing to thickness. Differences in training data frequency and contextual usage likely play a role. Using direct, common adjectives produces more reliable results.

The ceiling of thigh thickness control

Combining findings from the previous article (thick/plump/slender comparison) and this experiment, there is a clear ceiling to what thigh modifiers alone can achieve. Even massive doesn’t produce “dramatically thick thighs” — it indirectly increases thickness by changing overall body proportions.

Summary

For maximum thigh thickness, massive thighs is currently the best option, but you need to accept its impact on overall body proportions. Whether combining it with body type descriptors (curvy body, voluptuous figure, etc.) enables more precise control is a topic for future testing.

Lab Director’s Take: Even “massive” barely gets a reaction out of me. Nowhere near thick enough for a thigh enthusiast. Might need to go full body type override to get anywhere.

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