One idea.
Images. Video. Sound.

{
  "model": "flux-2-pro",
  "params": {
    "prompt": "A clean cinema-character-reference 3:4 headshot, framed from forehead to upper chest with the face filling most of the frame. A Northern European woman in her early thirties, lean athletic build, fair skin with a cool neutral undertone and a matte finish. Dark auburn hair in a deep copper-brown, cut to a blunt chin-length bob with a centre parting tucked behind both ears, fine baby hairs at the hairline. Strong angular features: high wide cheekbones, a square clean jawline, a straight narrow nose, thin upper lip with a fuller lower lip. Wide-set grey-green eyes, level outer corners. Straight dark brows, natural thickness, low arch. Bare skin register, no visible makeup, no liner, no lash drama. A small flat beauty mark below the outer corner of the left eye and no other facial markings: no freckles, no piercings, no tattoos, no scars. Both arms down at her sides, hands not visible, nothing in frame but head, neck, shoulders and upper chest. Plain black thin-strap camisole, no jewellery, no logos, no graphics. Body squared to camera, head level, neutral relaxed expression, eyes to camera, lips closed. BACKDROP: a single flat 18% neutral gray field, one uniform value at every pixel, corner to corner, no seam line, no gradient, no hotspot, no vignette, no falloff. It is a flat colour field, NOT a photographed backdrop: no surface, no floor, no wall, no corner, no horizon. LIGHT: completely flat shadowless illumination, one enormous soft frontal source at camera position, matched equal fill from camera-left, camera-right, above and below, so both sides read at exactly the same brightness. No key-and-fill ratio, no modelling, no shadow side, no nose shadow, no under-chin shadow, no rim light, no hair light, no kicker, no specular hotspot. Extremely low contrast, even, milky, catalogue-flat. NO SHADOW OUTSIDE THE SUBJECT: no cast shadow, no contact shadow, no drop shadow, no ambient occlusion where the body meets the background, no darkening behind the shoulders, no halo, no edge darkening. Shading exists only on the subject and stops cleanly at the silhouette. No light bleed, no spill, no glow, no bounce, no reflected colour cast on the background. Skin reads matte and velvety with light natural sheen on the high points only, no oily shine, real fine even pore texture, real peach fuzz at the jaw and hairline, subsurface scattering reading as semi-translucent biology. Skin renders at its true tone, never darkened, never pale, never washed-out, never cool-shifted by the background. Never plastic, never doll-skin, never waxy. Even sharpness edge to edge. No depth-of-field falloff, no bokeh, no background blur, no lens vignette, no distortion, no flare, no bloom, no chromatic aberration, no haze. Photographed on a 50mm prime. Photographed, not generated. No text, no letters, no numbers, no watermarks anywhere in the image.",
    "image_size": "portrait_4_3"
  }
}