Glossary
img2img
Generate a new image guided by a reference image instead of starting from pure noise.
img2img feeds an existing image into the diffusion process and starts from a partly-noised version of it. The 'denoising strength' (0.1–1.0) controls how much the model can change: 0.2 = subtle stylisation, 0.8 = same composition but otherwise new image.
Use img2img to restyle a photo, refine a rough sketch, or iterate on a previous render without losing the composition.