Nano Banana prompt: { "expression_block": { "emotion_type": "sof...
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Model used
Nano Banananano-banana-proGeneration parameters
Image2286x4096jpg
Prompt
{
"expression_block": {
"emotion_type": "soft joyful smile",
"intensity_level": "low to moderate (30-40%)",
"smile_style": "subtle controlled smile",
"teeth_visibility": "only upper teeth slightly visible (approx. 20-30%), lower teeth not visible",
"lip_movement": "gentle horizontal stretch without excessive vertical opening",
"jaw_opening": "minimal (10-15%)",
"lower_to_upper_lip_ratio_preserved": true,
"oral_commissures": "lifted slightly upward, natural curvature",
"nasolabial_folds": "softly engaged but not pronounced",
"cheek_activation": "mild zygomaticus major engagement",
"eye_expression": "eyes remain open, minimal narrowing (2-3%)",
"brow_position": "neutral, relaxed",
"overall_feeling": "warm, genuine, feminine, calm happiness"
},
"micro_expression_constraints": {
"no_wide_grin": true,
"no_full_laughter": true,
"no_overstretching_lips": true,
"no_exaggerated_dimpling": true,
"no_eye_squinting": true,
"preserve_bone_structure": true,
"preserve_facial_ratios": true
},
"negative_prompt_addition": [
"laughing hard",
"wide open mouth",
"big teeth exposure",
"exaggerated grin",
"horse laugh",
"overstretched lips",
"squinting eyes",
"cartoon smile"
]
}
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