xxg-portrait-rebuild-light

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xxg-portrait-rebuild-light is an image-edit skill for existing portraits. V2.3 separately controls physical light, exposure placement, color/style grade, capture-device response, broad skin tone, bounded reflection, scale/focus-aware microdetail, and AI-generation quality repair.

The skill changes the lighting without redrawing the person. It preserves identity, facial structure and proportions, natural slight asymmetry, expression, pose, camera view, and composition. It avoids plastic skin, grainy skin, dirty color variation, and fake depth made by exaggerating wrinkles.

Key features

• Provides texture-only fidelity recovery without changing source lighting, color, focus, depth of field, or scene content.
• Repairs plastic smoothness by separating clean broad tone, source-shaped highlights, and scale/focus-aware regional microdetail.
• Adds seven skin-finish profiles (P0–P6) for source-matched, satin-matte, soft-daylight, editorial, direct-flash, beauty, and available-light response.
• Adds E0–E7 exposure recipes that explicitly place highlight headroom, facial midtones, directional shadows, and black point.
• Adds G0–G8 color/style grades and D0–D8 capture profiles for full-frame digital, medium format, 35mm negative, CCD compact, point-and-shoot flash, smartphone, instant film, and disposable-camera response.
• Separates device response from optics: camera-style edits preserve viewpoint, perspective, crop, focal plane, and depth of field unless optical restyle is explicitly requested.
• Repairs weak backlighting, disconnected indoor window light, flat lighting, unintended crushed shadows, and highlights with no physical source.
• Supports soft window light, commercial soft light, Rembrandt lighting, cinematic low-key lighting, golden hour, dual-color neon, and diagonal hard light.
• Adds at most one physically coherent atmosphere effect, including prism refraction, blind/lattice shadow lines, rain-wet reflections, window/tree shadow, bokeh, sunset flare, volumetric light, or a full-black silhouette.
• Adds dedicated candle/flame and rim-led portrait keys with realistic falloff, edge placement, and restrained fill.
• Adds Q0–Q6 quality recipes for synthetic dirt/grid patterns, banding, edit seams, color drift, and cumulative multi-round degradation.
• Uses the first root base—not the previous edit round—as the stable color/identity reference, while retaining intentional new colors and authorized lighting or grading.
• Repairs only observed artifacts and preserves pores, hair, directional fibers, fabric weave, edges, shadow boundaries, and source focus falloff.
• Controls subject and background in layers: key light and exposure intent first, then fill, shadows, ambient light, and color temperature.
• Preserves identity, facial feature size and position, expression, pose, wardrobe, background structure, and source framing.
• Reduces the skin-detail target automatically when the face is small, without canceling the requested lighting change.
• Uses the current agent's own image-generation or image-editing capability by default; no separate API is required.
• If the current agent has no image-edit capability, or the edit misses the target, returns one complete compact image-edit prompt.
• Never uses Pillow, NumPy, OpenCV, ImageMagick, or temporary filter scripts to produce the delivered image.

Core method

The skill first makes a director-style lighting decision internally:

Scope → Key L → Exposure E → Fill/Shadow → Skin S/P → Light color T → Look G → Capture D → Atmosphere A → Quality Q

The prompt sent to the image model uses four compact core lines, adding RENDER only for a requested grade/device response and QUALITY only for an observed repair target. Target length is 55–110 English words:

EDIT: Choose the smallest authorized scope; retain source identity, geometry, pose, camera view, optics, framing, and every unauthorized axis.
LIGHT: One L and E with explicit highlight, midtone, shadow, black-point, background, T, and optional A behavior.
RENDER: One G palette/curve plus one D capture response. Omit for G0 + D0.
SKIN: One scale-aware S plus one light-consistent P finish.
QUALITY: One observed Q repair; omit for Q0.
AVOID: Only two or three source-specific failures.

The skill does not pile identity audits, object inventories, repeated negatives, and several photographic styles into one prompt. That often causes constraints to cancel each other or produces an unchanged copy.

For skin-only requests, V2.3 forces L0 + E0 + T0 + G0 + D0 + A0 + Q0. Tone correction changes only E/T/G; capture-style changes only G/D and a logically required E; relighting changes L/E/T/A; quality repair changes only Q. Viewpoint, perspective, crop, focal plane, and depth of field stay source-matched unless the user explicitly requests optical-restyle.

A6 forces E6 silhouette exposure, moves the effective light behind the person, removes all fill and catchlights, and renders the subject interior black. L/T and any G/D treatment affect only the rear source and background; S/P are suppressed.

Recipes

Choose only:

one L light + one E exposure + one S skin scale + one P skin finish + one T light color + one G color/style grade + one D capture response + zero or one A atmosphere + one Q quality repair

Lighting L

Exposure E

Skin scale S

Skin finish P

Color temperature T

Color and style grade G

Capture response D

Atmosphere A

Quality repair Q