Segue tudo unificado em um único prompt completo (principal + bloco extra de impasto) e pronto para colar no Nano Banana. Você só precisa subir a foto e usar exatamente esse texto.
Main prompt (description field)
"Use the attached photo as the identity reference and preserve 100% of the person’s facial features, proportions, bone structure, skin tone, hair style and gender, without changing who they are or their expression identity. The face must clearly be the same person as in the photo, only translated into the requested art style. Keep the same hair length, hair color, hair volume, hairline and overall hairstyle silhouette.
Transform this reference into a painterly expressive portrait style with thick impasto brush strokes and visible palette knife textures. Use loose yet intentional strokes that create semi-abstract realism and an emotional fine art painting look, with layered oil paint effects, textured canvas feel and rich tactile surfaces.
Increase the intensity and thickness of the impasto layers, as if multiple passes of heavy oil paint were built up over time. Make the brush strokes and palette knife marks extra bold, chunky and three-dimensional, with clumps of paint catching the light and casting tiny shadows. Let some colors mix directly on the canvas, creating slightly muddy transitions and imperfect blends, rather than clean, polished gradients.
Make the overall painting feel a bit messy and raw, with uneven edges, broken strokes and visible reworked areas where paint was scraped, smeared and reapplied. Allow overlapping strokes, drips, smudges and subtle ‘dirty’ color contamination between neighboring hues, enhancing the tactile, weathered and hand-made character of the artwork. Prioritize expressive, chaotic brushwork over precision, while still clearly preserving the person’s identity and facial structure from the original photo.
Use a soft pastel color palette mixed with muted warm and cool tones: dusty pinks, warm ochres, soft blues, desaturated teals and subtle earthy neutrals. Let the colors feel gently desaturated and harmonious rather than overly saturated.
Emphasize light and shadow using bold color blocks instead of hard outlines, with painterly blending and organic transitions between tones. Avoid sharp graphic edges; let brushstrokes define the forms and planes of the face.
Create a classic fine art portrait mood with a timeless, contemplative atmosphere. Preserve artistic imperfections and a clearly hand-painted aesthetic, with gallery-quality oil painting style, expressive facial textures and brushstroke-driven details, in a modern impressionistic realism approach. Keep the composition as a portrait focused mainly on the face and upper body, similar framing to the original photo, without distorting the facial identity."
Negative prompt (what to avoid)
"overly flat colors, posterized look,
cartoon, anime, chibi, comic-book inking,
3D render, CGI, plastic or glossy skin,
extreme photo-realism, HDR photo effect,
watercolor, pencil sketch, line-art drawing,
clean vector art, SVG, flat illustration style,
neon colors, oversaturated colors, harsh color grading,
strong outlines, cell shading, hard comic contour lines,
blur, soft focus, low resolution, pixelated,
text, logo, watermark, signature, frame, border,
distorted face, changed identity, different person, incorrect gender,
AI artifacts, glitch effects, over-smoothed skin, beauty filter look"
Se quiser deixar mais modular, dá para fixar o primeiro parágrafo (identidade) como template e só trocar os blocos de estilo/impasto entre diferentes prompts.