Add Krea2 evaluation loop

2026-06-28 20:07:31 +02:00
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+# Krea2 Prompt Guide
+
+This document records prompt rules discovered from actual SxCP generator
+outputs tested in Krea2. It is not a generic prompt cookbook. Add a rule only
+when an A/B image comparison shows that the wording improves or breaks Krea2
+behavior.
+
+## Core Rule
+
+Krea2 responds best when the prompt gives one clear visual hierarchy:
+
+1. subject/cast descriptor,
+2. action or pose,
+3. clothing state,
+4. location,
+5. camera/layout,
+6. expression,
+7. composition/crop,
+8. style.
+
+Avoid letting two sections describe incompatible camera or framing intents.
+
+## Prompt Output Contract
+
+- `sxcp_eval_out` must contain only the prompt being tested.
+- Analysis, scoring, and generator notes belong in chat or `sxcp_eval_log`.
+- Keep one experiment variable per cycle when possible.
+- Lock seed, character, location, and camera when testing wording changes.
+
+## Camera And Composition
+
+### Orbit / Multiangle Camera
+
+When Krea2 receives an orbit or multiangle camera, avoid selfie-specific wording
+unless the intended camera is actually a handheld or mirror selfie.
+
+Works better:
+
+- `lifestyle portrait frame`
+- `creator portrait frame`
+- `outfit-check pose`
+- `wide environmental coworking camera layout`
+- `camera placed several meters away`
+- `full seated body from head to knees`
+- `room depth surrounding the subject`
+
+Conflicting wording:
+
+- `selfie frame`
+- `phone selfie`
+- `holding the phone`
+- `creator-shot phone photo`
+- `handheld camera realism`
+
+Observed result: selfie words pulled a back-right elevated wide shot into an
+arm-length selfie. Removing selfie terms made the image follow the rear-quarter
+view much better.
+
+### Wide Shots
+
+Krea2 tends to keep attractive subjects large in frame. To get a real wide or
+environmental frame, be explicit about distance and visible environment.
+
+Useful phrasing:
+
+- `camera placed several meters away across the desk aisle`
+- `full seated body from head to knees remains visible`
+- `nearby desk edge, laptop corner, repeated desk rows, and tall-window depth clearly readable`
+- `wide environmental room framing`
+
+Avoid relying on `wide shot` alone.
+
+## Location Layout
+
+Location-aware camera text works when it describes the room around the subject
+without stealing the foreground from the subject.
+
+For coworking lounge:
+
+- Keep `warm desks`, `laptop tables`, `glass partition seams`, `repeated desk rows`,
+  `plants`, and `tall windows`.
+- Mention foreground anchors only when the camera should actually see them.
+- In POV, keep location anchors beside or behind the bodies, not in the lower
+  foreground.
+
+## Clothing Continuity
+
+When a softcore outfit is reused in a later branch, name what happens to actual
+outfit pieces instead of using generic fabric language.
+
+Works better:
+
+- `denim shorts are pulled aside or removed below the hips`
+- `button-down shirt tied at the waist and fitted bralette remain visible from the same outfit`
+
+Avoid generic fallback wording:
+
+- `fabric slipping off`
+- `partly exposed`
+- `outfit pushed aside where needed`
+
+Use generic wording only when no source outfit exists.
+
+## POV
+
+In POV prompts, the visible subject should still be established first. The POV
+participant is the camera viewpoint, not a normal visible cast member.
+
+Works better:
+
+- visible subject descriptor first,
+- then POV action,
+- then foreground hands/body/clothing cues.
+
+For POV clothing, describe only visible body/clothing fragments:
+
+- `foreground hands, hips, thighs, or lowered waistband`
+- `foreground hands, forearms, sleeves, or torso edge`
+
+Avoid:
+
+- full third-person `Man A wears...` phrasing for the POV participant,
+- making `the viewer` the first subject before the visible character is
+  established.
+
+## Style
+
+Style should describe rendering, not camera mechanics.
+
+Use style presets to choose between:
+
+- natural photo,
+- creator/social-media photo,
+- documentary/direct-flash photo,
+- cinematic realism,
+- illustration/comic.
+
+If a controlled camera is active, avoid style suffixes that imply a conflicting
+camera such as `phone photo` or `handheld selfie`.
+
+## Guide Update Format
+
+When adding a new rule, include:
+
+- observed prompt,
+- observed image failure,
+- edited prompt wording,
+- image improvement or regression,
+- generator path if known,
+- final rule.