This was my attempt at making a photoreal OC succubus. It came out a bit differently, and it has two modes:
At low strength, it adds succubus features to your character: it adds or improves ram horns and dark bat wings.
At full strength, with "a succubus" in the prompt, it brings its own built-in succubus: lavender skin, black hair, amber eyes, ridged ram horns, pointed ears and a thin tail (often without a spade tip).
HOW TO USE
To make your own character a succubus, use 0.3–0.5 and name the features you want, for example "with ram horns, bat wings and a long thin tail". She keeps her own face.
For stronger features and a curvier body, go up to 0.6–0.8 with the same wording. From about 0.8 her face starts to shift toward the built-in look.
For the built-in succubus, use 0.8–1.0 and just write "a succubus". There's no need to describe her.
For a custom skin colour, use about 0.4 and put the colour first, for example "a purple-skinned woman with ram horns…".
Trigger word:
sccbzexists but makes no visible difference. Leave it out.
WHAT CHANGES AS YOU RAISE THE STRENGTH
From about 1,400 test pictures (five different characters, many scenes):
0.3–0.6: for most characters, horns and wings appear (or turn into the LoRA's own: ridged ram horns, dark-veined bat wings). The face, hair, and make-up stay the character's own. The bust grows a little with each step from 0.3.
0.6–0.8: the horns get bigger, the body curvier, the skin a little cooler.
0.8–1.0: the character drifts toward the built-in succubus. The whole picture cools; warm lamp-light loses its glow.
Skin colour: cool colours (purple, grey) hold at any strength. Red and other warm colours fade as the strength goes up, because the LoRA pulls skin toward its own lavender. Keep warm colours at 0.4 or lower.
Tail: asked for together with horns and wings, it comes at any strength. Asked for on its own, it mostly needs 0.8-1.0.
THE BUILT-IN SUCCUBUS
With "a succubus" at 0.8–1.0 you get the same character every time:
lavender to deep violet skin (deeper at 1.0), long black hair, a mature face with amber eyes and dark lips;
large ridged ram horns curling past the cheeks, pointed ears;
a thin smooth tail, often without a spade tip; dark veined bat wings (they often turn up even when not asked for);
A figure consistent with classical succubus;
KNOWN LIMITS
Cool cast: at 1.0 the whole picture shifts cool or violet. Use 0.6–0.8 for warm-lit scenes.
Unasked wings at high strength. Wings also tend to bring horns along.
Photo bias: fantasy-painting styles get pulled back toward a photograph. Anime styles hold.
Warm skin colours fade at higher strength (see above).