Select the number of samples and how blurry you want the image to be, and then click the stage. A high number of samples for a small blur will make the rendering quite slow while not making it noticeably smoother.
The higher the samples, the smoother the blur will appear. If the number of samples in higher than 10, I would highly recommend TurboWarp: https://turbowarp.org/866626683?stuck I used @52525rr's full precision image scanner: https://scratch.mit.edu/projects/677368095/ to scan an image I generated using Stable Diffusion.
