>>36301117There's not really a guide per say, picrel is a quick and dirty rundown of each of the samplers. My personal rule of thumb has been to do ~30 steps with Euler/a and ~40 steps on DDIM for a 512 by X resolution image. When I find a seed that I want to upscale with the hires fix, I double the steps alongside doubling the resolution of the image. I haven't done any testing for that, its just gut feel really. I also haven't played around with the other samplers much.
