[Experiment] Raincoat Prompt Verification — Output Differences Between raincoat / yellow raincoat / transparent raincoat / nude underneath / hooded raincoat

Conclusions First

• The yellow raincoat color specification works stably — yellow raincoats appeared in all 3 outputs
• transparent raincoat functions accurately as a transparent vinyl material — a semi-transparent material showing the clothing underneath was reproduced in all 3 outputs
• wearing only a raincoat, nude underneath functions as a bare skin expression — a state with no clothing under the raincoat was generated in 3 out of 3 images
• hooded raincoat stably generates a hooded state — all 3 images have the hood up
• An unspecified raincoat defaults to an opaque trench coat-like style — color varies across khaki, navy, and beige
• yellow raincoat and transparent raincoat tend to generate with a hood — an interesting tendency where color/material specification also appears to influence whether a hood is present

Experiment Design

Change only the raincoat modifier as a single variable and observe the effect on the output.

Model / Parameters

Base Prompt

The {VARIABLE} part is swapped out for each condition.

Condition List

Evaluation Criteria

• Raincoat color, material, and shape
• Presence or absence of a hood
• Presence, absence, or transparency of clothing worn underneath
• Consistency of the background (rainy street scene)

Results for Each Condition

A: Basic (raincoat)

Seed 42	Seed 123	Seed 789

Observations

• All 3 images generated a long-length raincoat
• Color varies: seed 42 is khaki-ish, seed 123 is navy, seed 789 is beige — color varies because no specification was given
• All have no hood (or a folded-down hood). Material is an opaque fabric
• Seed 789 has a double-breasted trench coat design, closer to a coat than a raincoat
• All backgrounds are a wet-pavement Japanese shopping street, with consistent rainy atmosphere

B: Yellow (yellow raincoat)

Seed 42	Seed 123	Seed 789

Observations

• All 3 images generated a clearly yellow raincoat. Color specification works stably
• Worth noting: all 3 images have a hood (seed 123 and seed 789 have the hood up). Compared to the basic raincoat which had no hood, yellow raincoat tends to generate with a hood
• Seed 42 has 2 people — another person in a yellow raincoat appeared in the background
• Material is the same opaque fabric or nylon as condition A

C: Transparent material (transparent raincoat)

Seed 42	Seed 123	Seed 789

Observations

• All 3 images generated a transparent/semi-transparent vinyl raincoat. The transparent specification works very well
• The black clothing (T-shirt or camisole) worn underneath is visible through the raincoat
• All 3 images generated with a hood. Transparent vinyl raincoats with hoods are common in real products, so this is a natural result
• Water droplets and light reflections are depicted on the raincoat’s surface, well expressing the vinyl material texture

D: Bare skin expression (wearing only a raincoat, nude underneath)

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Seed 42	Seed 123	Seed 789

Observations

• 3 out of 3 images generated a state with no clothing under the raincoat. The nude underneath specification is working
• Seed 42 and seed 123 have the raincoat open at the front, with bare skin directly visible
• Seed 789 has bare skin showing through a semi-transparent raincoat
• The raincoat itself is a long-length with a hood, same as condition A, but tends toward semi-transparent material (similar texture to condition C)
• All 3 have wet hair, emphasizing the situation of exposure in the rain

E: Hooded (hooded raincoat)

Seed 42	Seed 123	Seed 789

Observations

• All 3 images generated a raincoat with the hood up. The hooded specification works stably
• Color varies: seed 42 is khaki-ish, seed 123 is dark gray, seed 789 is beige. Color varies as in condition A
• The hood is firmly on the head, with the hood’s edge visible around the face
• Material is opaque fabric — condition A’s basic form with a hood added

Cross-Condition Comparison (Same Seed)

Condition	Seed 42	Seed 123	Seed 789
A: Basic
B: Yellow
C: Transparent
E: Hooded

※ Condition D is excluded from the cross-comparison table due to mosaic processing.

Summary

Effect by Modifier

Hood Behavior Worth Noting

An interesting finding: while raincoat alone generates without a hood, yellow raincoat and transparent raincoat tend to generate with a hood. Even without explicitly specifying hooded raincoat, the color or material modifier appears to influence whether a hood is present.

On the other hand, specifying hooded raincoat results in the hood being worn up. In other conditions, even when a hood is attached, it may not be worn up. “Having a hood” and “wearing the hood up” are different states — hooded appears to mean the latter.