One-shot has three input types. Image builds the model from a photo or render of the object as-is. Sketch builds it from a drawing plus a few words about what it is.
Pick One-shot, then Image
The box turns into a name field and an Add image button appears.
Add the reference
Click Add image, or drop or paste a picture. One clear view of the object. The bar’s own advice: one object, plain background, soft light. A new pick replaces the old one.
Name it (optional)
The text box is a name for Image, not a prompt. Leave it empty if you like.
Choose Pro or Max, then Generate
The phases are Prepare, Build 3D model, Done. There is no concept-art step, your image is the concept.
Pick One-shot, then Sketch
The same single image slot, for the drawing.
Add the sketch
A photo of paper, a tablet drawing, or a line render all work. Clean lines and one object.
Say what it is
The box asks What is it? A few words, for example a wooden rocking chair, keep the interpretation on track.
Choose Pro or Max, then Generate
The phases are Prepare, Concept art, Build 3D model, Done.
Sent a sketch to Clone by mistake? It comes back as Not accepted with a one-click Try One-Shot sketch mode button, and nothing is charged.