If you have a source model to render, just do that, indeed. This is for doing the opposite - i.e. you input actual pictures, and it tries to understand the sha

If you have a source model to render, just do that, indeed. This is for doing the opposite - i.e. you input actual pictures, and it tries to understand the shape of things based on how they look different between pictures. Now you can create more pictures, from new angles. (Oversimplified, but that's the idea)