[Experiment] Panties Type Comparison — 5 Types + Thong Top Stabilization Test

Conclusion First

• panties doesn’t guarantee only panties — 1 of 3 images was a T-shirt + panties only, but the other 2 generated a bra and panties set
• underwear produced a bra + panties set in all 3 images — underwear is the most stable choice for reliably generating a matching lingerie set
• lace panties clearly reflects lace material — sheer texture and decorative detail was confirmed in all 3 images; material specification works well
• cotton panties produces simple, unadorned panties — plain and no-frills look, in contrast to lace
• thong clearly changes the shape — a high-cut, narrow-strap design appeared in all 3 images, but topwear was unstable and 1 image was topless
• Explicitly specifying a top with thong and [top] stabilizes output — topwear was present in 3/3 images for thong and white tank top, thong and bra, and lace thong and matching lace bra
• thong and bra tends toward a decorative lace lingerie set — even with just bra, decorative lace and side ribbon bras appeared
• lace thong and matching lace bra is prone to additional accessories like garter belts — 2 of 3 images had added straps or garter belts

What This Article Covers

• How panties appearance changes across 5 underwear keywords
• Whether panties vs underwear affects the presence or absence of a top
• How well material specification (lace / cotton) is reflected
• Whether thong produces a distinct shape difference
• Whether the thong topwear instability issue can be solved by explicitly specifying a top

Experimental Design

Base Prompt

Unified with bedroom setting and standing pose; only the underwear keyword is swapped.

Evaluation Criteria

• Panties shape and material texture
• Presence or absence of a top (panties only vs full set)
• Style consistency across 3 images

Results per Condition

A: panties

seed 42	seed 123	seed 789

Observations:

• seed 42: Gray T-shirt + pale pink panties. The top was auto-filled in, so no panties-only output
• seed 123: Navy bra + panties set with lace detail
• seed 789: White bra + panties set with lace detail

A bra was added in 2 of 3 images, resulting in a full lingerie set. panties alone does not guarantee panties-only output. In seed 42, a T-shirt was auto-generated, suggesting the model tends to avoid a bottom-only underwear look.

B: underwear

seed 42	seed 123	seed 789

Observations:

• seed 42: White bra + panties set with lace detail and ribbon
• seed 123: Navy bra + panties set with lace detail
• seed 789: White bra + panties set with lace detail

All 3 images produced a bra + panties top-and-bottom set. underwear is interpreted as “a full set of underwear,” where the bra is intentional rather than auto-filled. underwear is the most reliable choice for consistently generating a matching lingerie look.

C: lace panties

seed 42	seed 123	seed 789

Observations:

• seed 42: White lace bustier (corset-style) + lace panties. The top also matched in lace
• seed 123: Navy lace bra + lace panties. Fine lace pattern well represented
• seed 789: White lace bra + lace panties. Sheer lace material visible

Lace material texture was clearly output in all 3 images. Compared to conditions A and B, sheer texture and floral decorative patterns were distinguishable. In seed 42, a bustier-style top appeared, suggesting that lace influences the overall outfit style as well.

D: cotton panties

seed 42	seed 123	seed 789

Observations:

• seed 42: Gray T-shirt + plain white panties. No decoration, simple
• seed 123: White sports bra + plain white panties. No embellishment
• seed 789: White bra + plain white panties. Simple design

All 3 images produced plain white panties with no decoration. Compared to condition C (lace panties), there was no lace or sheer texture at all — the unadorned cotton feel came through. In seed 42, a T-shirt was auto-filled, matching the same tendency as condition A seed 42.

E: thong

seed 42	seed 123	seed 789
		NSFW - クリックで表示

Observations:

• seed 42: Striped crop top + navy thong with side ribbon. Small fabric area, high-cut design
• seed 123: Navy triangle bikini top + navy thong. Looks close to a micro triangle bikini
• seed 789: Topless + navy thong. No top was generated

Thong shape was confirmed in all 3 images. Compared to other conditions, the fabric area is clearly smaller with a consistent high-cut, narrow-strap design. However, the topwear was unstable — seed 42 got a crop top, seed 123 a bikini top, and seed 789 was topless. thong appears to be interpreted in a higher-exposure context, which suppresses top generation.

Experiment 2: Stabilizing Topwear for Thong

Experiment 1 condition E showed that thong alone results in unstable topwear (1 of 3 images topless). Findings from the camisole verification article suggested that “listing all worn items explicitly” is the most stable approach. Here we test whether explicitly specifying a top alongside thong stabilizes top output.

F: thong and white tank top

seed 42	seed 123	seed 789

Observations:

• seed 42: White cropped tank top + white thong. Ribbed knit texture
• seed 123: White tank top + navy thong. Slightly angled pose, tank top clearly output
• seed 789: White tank top + white thong. Front-facing standing pose, cropped tank top

A white tank top was output in all 3 images with no topless results. Compared to condition E (thong alone), explicit top specification worked effectively. Tank top color matched white as prompted in all 3 images. Thong shape maintained the same high-cut, narrow-strap design as condition E.

G: thong and bra

seed 42	seed 123	seed 789

Observations:

• seed 42: Navy lace bra + navy lace thong with side ribbon. Decorative top-and-bottom set
• seed 123: Navy lace bra + navy lace thong. Similar color to condition E seed 123, but bra clearly output
• seed 789: Gray × navy bra with lace trim + matching color thong. Coordinated color scheme

A bra was output in all 3 images with no topless results. Notably, just writing bra produced lace-decorated bras in all 3 images. The thong context appears to pull the bra style toward decorative, more sensual designs. Lace rate is higher compared to condition B (underwear).

H: lace thong and matching lace bra

seed 42	seed 123	seed 789

Observations:

• seed 42: Light blue lace bra + lace thong + garter belt. The garter belt was not in the prompt but appeared anyway
• seed 123: Navy lace bra + lace thong + strap detail. Additional straps appeared between bra and thong
• seed 789: Black lace bra + lace thong with side ribbon. Sheer lace texture clearly output

Lace bra + lace thong sets were output in all 3 images with no topless results. However, 2 of 3 images (seed 42 and seed 123) included garter belts or straps not specified in the prompt. High-decoration keywords like lace and matching appear to elevate the overall lingerie set’s elaborateness and trigger additional accessories. Colors varied across all 3 (light blue, navy, black) since no color specification was given.

Experiment 2 Summary

Topwear was stable at 3/3 for all 3 conditions. The thong topwear instability issue is resolved simply by explicitly specifying a top. However, stacking lace keywords as in lace thong and matching lace bra tends to add unintended accessories like garter belts. For simple control, concise specifications like thong and white tank top or thong and bra are more suitable.

Cross-Condition Comparison (Same Seed)

seed 42 (Experiment 1: A–D)

panties	underwear	lace panties	cotton panties

seed 42 (Experiment 1: E + Experiment 2: F–H)

thong	thong+tank top	thong+bra	lace thong+lace bra

seed 123 (Experiment 1: A–D)

panties	underwear	lace panties	cotton panties

seed 123 (Experiment 1: E + Experiment 2: F–H)

thong	thong+tank top	thong+bra	lace thong+lace bra

seed 789 (Experiment 1: A–D)

panties	underwear	lace panties	cotton panties

seed 789 (Experiment 1: E + Experiment 2: F–H)

thong	thong+tank top	thong+bra	lace thong+lace bra
NSFW - クリックで表示

Summary

Usage Guide

• Want a stable matching lingerie set → underwear
• Want lace texture → lace panties (top will also be lace)
• Want simple, everyday underwear → cotton panties
• Want thong + top stably → thong and white tank top or thong and bra
• Want a lace lingerie set → lace thong and matching lace bra (watch for added accessories like garters)
• thong alone is not recommended — topwear becomes unstable; always specify a top explicitly
• panties is ambiguous — not guaranteed to be panties-only; use case is unclear

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