WHAT IT DOES
Most tools re-roll the character every shot, because every shot is a fresh throw of the dice from the same words. Here a character is cast once, approved as a picture, and every later shot is filmed from that picture.

Each character carries a written descriptor — build, hair, wardrobe — that you can read and edit. It can be locked, so nothing downstream rewrites it, and it is versioned, so a descriptor that changed says which version it is on.
The descriptor produces candidate renders and you pick the canonical one. From it comes an eight-pose identity sheet — front, three-quarter, profile, back, and the expressions — and those are what later shots reference.
Upload a photo and it is cast exactly the same way: it becomes the canonical render, the identity sheet is drawn from it, and every scene is filmed from those. You were in a studio for none of it.